I usually get in the low 40s around town, mid 40s if I go on small jaunts during my work/school week. For some odd reason, I've been in the high 30s for the past 2-3 tanks. Pulling my plugs shows me running lean (very slight tan around the tips of the plugs, the rest are white, but they're iridium and may read differently, so I'm uncertain). I was going to start a troubleshooting thread, but I'm doing my valves this weekend, hoping that that may fix it as I've never even had the valve covers off since buying the bike.
What I love about this bike is that on trips I do around the mid to high 40s at least. I've hit the 50s in the past, all pending on my riding style, where I'm riding, and the traffic. If it's nonstop cruising around 70 MPH like on a highway or interstate without slowing down or speeding up at all, I've made in the low 50s.