I'm an old guy and I despise that saying. I think people either forget or never knew the origins of it - back in the day, really fast bikes were fire breathers that didn't idle or handle slow speed well, had light switch throttles, and regularly tried to kill you. Nowadays you can get 200+HP on bikes that you can commute with. I hate the feeling of wringing out a bike to get all the power out of it and wishing it had more. So however fast I can ride a slow bike to its limit, I'd rather ride a fast bike as slow as that slow bike, and still have more power to go faster if I wanted.