I don't know if it applies as I'm in one of the few markets Comcast trialed 150Meg service. But they basically bumped everyone here up to the next highest tier. So if you were paying for 100 you get 150, 50 you get 100, 30 you get 50, whatever else was lower up a bit.

It was nice, but to be honest this should be happening more often not just once every... ever really.