It's clear that Honda has re-prioritized, and made fuel economy a more important goal for its upcoming models. I bet it's part CAFE, part higher fuel price forecasts for 2013 and beyond.
To my eye, the 2011 looks about the same aero-wise, except for the wheels. The 2010's wheels make you cringe when you see them in person. Their only saving grace is that the "blender" portion of the wheels is near the hub, where maximum airspeed is slowest.
2010:
2011:
