People have the less MPG stuck in their heads with AWD. It is just no longer true if look up EPA figures.
Case in point:
AWD Traverse 16city/23 highway
FWD Traverse 17city/24 highway
I recently test drove a FWD Travese but after finding the minimal MPG difference skipped it. Not worth it, also resale is very poor as 2wd/FWD(oxymoron) SUV in my area is highly undesirable.