I do the same kind of riding that cug describes and the last time I checked (using actual math) the bike gave me 43mpg. That's the lowest I've ever gotten, and I attribute it to the "winter blend" of gasoline.
My bike is 100% stock map & exhaust. Over the 8 months I've had it (as of today), I had been getting a consistent 48mpg, so that number was a surprise to me. I wasn't out hammering the throttle either, just riding my usual routes and in the normal way.
2011 Tiger 800 ABS. Crystal White