Since my ride only has about 250KM's I have been able to see the wind effect on this ride. But it's to expect with a little car. Heck, my wife's Hyundai Accent is the same...
Overall, so far I'm really enjoying the Aveo. It's great in the snow (trust me, we got the **** load last week), I love the sound system, for a base system, man it's not bad. Fuel economy, still in testing phase. I was able to pull 250KM's on half a tank. That includes getting half stuck in snow, (2 snow storms), spinning in the snow and the actual resistance 6" of snow gives while driving, starting the car for a warmup (5 mins) etc.
I'm laughing at a guy here that just bought a used Trailblazer! He spent $100 of gas in one weekend! LMAO!