but in the summer I do appreciate the air movement more .
thats for damn sure. i'm DREADING the 95% relative humidity, 95 F summer weather thats just a month down the road. why do i even live here? this place is a sweatfest full of sucky roads. what good is being able to ride year round if that's how its gonna be?
the screen does add a bit to drag from the bike, yet reduces the immediate impact of the air on the rider (by reducing frontal area exposed to the direct wind), reducing drag there. i dunno how to quantify it, i suppose you could do some kind of mythbusters style test with each screen installed having the rider sit in the same position using the same cruising speed/throttle setting. really the comfort is more important, so even if it did cost a little bit of gas mileage (which would mostly be noticeable at highway speeds where drag would be greatly increased vs. putting around town) it would be worth it.
sanger - conversely to your experience, higher speeds and accelerating (now i'm gonna sound like a hooligan) make riding my CBR more comfortable, as it helps take the weight off my wrists. i know, it's not really a transportation bike so much as a race bike, but it's so fun to ride.
lol - i'm glad you liked my crude picture... i'm here to help