I use Fuelly.com to track my bike mileage. I haven't posted the last 3-4 fillups. But this whole summer, I've been tracking my mileage and it's been a steady 53-55MPG. But then again, I also commute 60 miles a day and my RPM's average 7k. I have stock gearing in my bike as well. I travel (as my speedometer says) about 75-80 MPH. (Don't tell the law enforcement lol).
I'm bout the same except using a PCV with a more aggressive map, but average around 51mpg. Who'd have thought higher revs equaled better mpg.