i run 36f / 35r in my pilot powers (street riding only), and have no problems at all. I will be experimenting with tire pressures this year (just in case i find something that works better) and will post up any results .
road tyres run road pressures due to carcuss construction etc, dropping pressures to low can cause the side wall to move around to much and make the tyre overheat. So use race rubber if you are serious and want to play with tyre pressures. 10 years road racing and in the buisness has taught me this.