Only two places the %'s matter:
1. Bike setup -- where do you want it to perform.
2. Trying to let everyone on the thread know how "Hard Core" you are.
I just picked up a 990R that I'm setting up to be a big dirt bike, but..... I'll be lucky to get 50/50 for mileage. It's 70 miles to get to good dirt local or 130+ for Baja