Yeah, but there have been equally strong hints that they are reluctant to retroactively change everything to fit a new model. They're much more likely to introduce more new material (e.g. the changes to monster design from MM1 to MM2). Maybe, they'll add a sidebar suggesting alternative ability boosts for those who feel the RAW ones are too restrictive.To sum it up, it depends on whether the dev team really wants to update all races to a A +2 and B +2 or C +2 model. That all PHB3 classes had a writeup like that is a pretty strong hint, though.