I just posted in another thread about the 100/110 tire on the back, I think it's a matter of preference. With the standard engine mods I felt a slight difference in acceleration from a dead stop. The bike feels a little sluggish to me, but to someone else they may feel nothing at all. It's a slight difference is what I'm trying to say.
Some physics guru could probably give you the inertia/acceleration/ various surface characteristics explanation, but all in all it's fine to run bigger unless your bike is running under power, then I think you would be unhappy.