Acadia MPGs???

I'm considering purchasing a Traverse when it debuts this Fall, but I'm not believing the projected MPG ratings. The Traverse will weigh AT LEAST 500 lbs more than a Chevy Uplander minivan and AT LEAST 1000 lbs more than a Chevy Equinox, yet it's MPG rating is projected to be the same as both of them (17/24). Since the Traverse will be a "sister" vehicle of both the Buick Enclave, Saturn Outlook, and GMC Acadia, I was wondering if any Acadia owners out there could weigh in on their actual mileage numbers.

Are you getting 17 mpg city and 24 mpg highway, or is it better or worse than that?