(CNN) - When Linda Waterhouse was 16, she went out with a friend who had too much to drink and couldn't drive home. If her friend's car had been an automatic, there wouldn't have been a problem -- but it had a manual transmission.
Luckily, Waterhouse had driven a tractor before, giving her some familiarity with stick-shift driving. She wrestled the car into second gear and managed to drive them home.
Now a mother of three girls, Waterhouse and her husband have already taught two of their daughters to "drive stick."
"You never know when you're going to need the skill," she said.
The ability to drive a car with a manual transmission has long been considered an essential skill, especially for young drivers. Yet decades after Waterhouse's impromptu introduction to stick shifts, changes in the makeup of the automobile and American consumer habits mean mastering the manual may no longer be a practical necessity.
Downshifting: Thinning of manual herd
In the earliest days of the automobile industry, cars came with only one type of transmission: the manual.
After General Motors released the first automatic transmission -- the 1940 Oldsmobile Hydra-Matic -- automobile manufacturers swiftly moved away from manuals. By 1957, 82.7% of American-made cars were equipped with automatic transmissions, according to "Ward's 1958 Automotive Yearbook."
Though manuals have accounted for about 4% of American car sales in recent years, experts were surprised to see the percentage jump almost 3% in the first quarter of 2012, according to a report by Edmunds.com.
The percentages may seem small, but with nearly 12.8 million cars sold in the U.S. last year, those sales add up to more than a half million manuals.
Some manufacturers have inferred that the 6.98% "take rate," or percentage of total cars bought, signifies a manual comeback in the consumer market.
Despite earlier worry about appealing to millennials, Cristi Landry, Chevrolet's small car marketing manager, said General Motors believes there's a future for manuals in the U.S. consumer market. The company has gone so far as to create mechanisms meant to make manuals more appealing to drive, like the rollback-ready Hill Start Assist feature.
Upshifting: comeback or blip?
Chris Terry, a product communications representative for Ford Motors, said that while he's not so sure manuals are making a comeback with average consumers, he believes some people will always want them.
"Most people are just interested in getting from A to B," Terry said.
People who purchase manuals, Terry said, either love the act of driving or are enticed by manuals' historically lower price tag. (Some small cars like the Chevrolet Sonic, however, are more expensive as manuals.)
"Manual transmissions are considered common novelty. In the rest of the world, it just isn't so," Terry said.
If automatics become cheaper in other countries, this may change, he said.
Despite the uptick in manual take rates, not everyone is convinced manuals are making a comeback.
"The U.S. market has been moving away from manuals over the past couple of decades," said Steve Yaeger, Nissan's technology and motorsports communications manager. "We do not see a change in that trend in the foreseeable future."
Nissan, which only offered manual transmissions in 10 of its 19 models in 2011, had an overall manual take rate of 2.1% last year. Just over half of manual sales came from two cars -- the Z Coupe and the Frontier pickup truck.
"It might look like there's a stick-shift revival under way in 2012, but we're not so sure," Edmunds.com Features Editor Carroll Lachnit said. "Fewer manual transmission cars on the road will mean, eventually, that there will be fewer parents or friends who know how to drive them, and so fewer teachers for the next generation."
Pumping the brakes on hype
Manuals, when driven correctly, have traditionally been more fuel efficient than other transmission types, but new transmissions and improvements to automatics have rendered this moot in some models. The automatic Ford Focus gets slightly better gas mileage than its manual counterpart; moreover, new options like continuously variable, dual-clutch and semi-automatic transmissions with paddle shifters, while expensive, can make up for their price tag with fuel efficiency.
"Almost all the high-mpg cars you see advertised on TV, whether they're hybrids or a Chevy Cruze, get their best mileage with one of these other types of transmissions," Cars.com Managing Editor David Thomas said.
It's important to remember that gas prices, while high, have been high for the past few years -- and manual take rates haven't skyrocketed in that period of time.
Where are manuals' advantages?
For some consumers with children, technological advancements in other transmissions are outshined by perceived experiential benefits of the manual.
Margaret Menotti, an account manager in Boston, is wary of teaching new drivers in automatic cars.
"We made both of our children learn to