What's fast for a bike?

I'm a car guy, and I'm aware that bikes typically have less horsepower than cars do, however due to the weight of them the power to weight ratio can often be similar or greater. When you're into performance cars, generally ∼200bhp is fast enough, ∼300bhp is pretty quick, and ∼400+ is considered a fast car, so I'm curious what these rough figures are for performance bikes?