Originally Posted by
smashndash
Power doesn't cause lateral flex, weight does. If you're pretty heavy and like to throw the bike around, you might see some brake rub, but you wouldn't be able to replicate that by hand.
Even then, that's really more a hub to dropout/fork relationship. I run centreline X rotors on 350 hubs on my roubaix as above and im 123kg and can drop 1400w in a sprint. Haven't had too many issues outside of wet rides.