I agree with many of the points above. I'm getting about 25/26 with the mixture of city/highway and found the same issue with EcoPro. I think the MPG on the sticker is absolutely a stretch. I think the point about air conditioning is fair - we'll see what happens with the fall arriving.
I still feel good about the numbers though. I hit 27 on a trip to New Hampshire and that same trip with my Infiniti EX35 would have only achieved 23 (maybe). And the city number for that car was ugly (17). I just did two trips back and forth with a lot of stop and go on a small road and got 24. So I'm averagine 5 - 7 MPG more in the X1 - so this is a win for me!