I noticed it as well, and now that this discussion has been voiced by others, I definitely know it's there. Only in 1st gear pulling away from a dead stop - but that's really the only time the bike is ever below 2500 rpm. I've worked around this by just revving the engine a bit higher than that while letting the clutch out, just to avoid that bogging down. If the clutch is all the way out and you're giving it more throttle to get past the bog, and all of a sudden the car in front of you hits the brakes, could be a shitty situation.
Just slip the clutch a bit more to get going is my solution. Hopefully a flash would solve this, as I'm not sure if it's a fueling issue?