Let me try to clarify why some people, specifically me, are concerned with gas mileage.
As you all point out, it's really not a matter of mileage, it's a matter of the overall range of the vehicle.
When going on a long trip such as Danbury to Lake George for SpyderQuest, one would like to stop every two or so hours.
A range of 120 miles per tank is OK. You need to stop anyway.
BUT, if you use the bike as a daily commuter, 120 miles means you have to stop for gass every other day to fill up, adding to your commute time.
To what purpose ?
Just my opinion, and I'm sticking to it.