FYI... if anyone thinks the Acura RDX will get better mileage, think again... Edmunds.com tested one and while they pretty much said it's superior to the CX-7 (expected, hence its price tag), they also reported getting 11 mpg in the city and 18 hwy when they pushed it hard.
The point here is that you're pushing around a 2-ton AWD vehicle. Turbo or not, it's gonna eat gas. AWD Muranos owners report similar numbers for mpg. Just goes to show you there's no getting around the physics - if you want to propel a heavy car at a decent rate, you're gonna need a lot of gasoline. The only solution would be to make it slower by using a less powerful engine or put in a diesel engine, maybe even a hybrid. Everything has its pros and cons and there's no perfect car out there.