"Basically, if a player is created with average or high potential and has a low start rating, the start rating will now be bumped up a little bit. So his max rating doesn't change at all, he just gets a head start on meeting that max. You'll still see guys with lower start ratings have high potential, but you won't see guys with really really low start ratings have high potential. But it's important to know that we're not reducing the amount of potential, just bumping up the start rating."
from the dev chat