Pretty much, yes. We've had prolific posters admit they didn't know the Japanese had any fighter other than the Zero before playing AH. If I recall correctly, another guy said he thought the Typhoon was a made up fictional airplane at first because he'd never heard of it until seeing it in this game.
I wouldn't say it is 80%, but it is a substantially influential number where the in game polls are concerned.
I knew most of the planes before I joined AH or Airwarrior rather, not in complete detail and I still don't, but still baffles me some wouldn't take the time to at least look at what they are voting on, only reason I voted on the Me-410 is it was one of the very first wishlist posts I made next to G.55 -
I kind of figured the usual "Ki-43 and beaufighter" would of been added long time ago given how significant they fought in WW2, why they continue to elude being added in game amazes me.
Meteor I was sure to win the voting poll, i can see every 2 weeker screaming "ZOMG JET" without realizing how many perks it would be and few years from now still trying to gather enough for it.
Then again I realized apparently nobody even knows what a Meteor was, given the history channel and such - they would vote on a perked P-51 mustang before a meteor.