I have never heard of anything with boosted control surfaces, other than the P-38, in WWII. I wouldn't be shocked if a bomber like the B-29 had them as I don't read as much about bombers, but I would have to see primary source documentation supporting the claim for a fighter.
Still hunting down the page I was lookingn at about the 190 I do think it was article about a crashed FW that had been found in Russia or something that mentioned it?? Grrr the only thing I can find is forum posts were some say it is electrically boosted and others say it uses control rods?
Interestingly you can add the Tempest to the list of planes that boosted ailerons says here they used a spring.
"The ailerons were fitted with spring loaded tabs which lightened the aerodynamic loads, making them easier for the pilot to use and dramatically improving the roll rate above 250 mph (402 km/h)"
from
http://en.wikipedia.org/wiki/Hawker_TempestThis on the 190 is interesting and might explain its excellant high speed handling in game...
"Instead of the customary cables and pulleys used on most aircraft, which tended to stretch, resulting in 'give' and 'play' that made the controls less crisp and responsive, the design team used rigid pushrods to actuate the control surfaces. Another innovation was making the controls as light as possible.
The maximum resistance of the ailerons was limited to eight pounds, as the average man's wrist could not exert a greater force."
But how did they go about this??