Yeah I know, bout time GM woke up!
Anyways to be on topic. I read in the MM&FF that they were getting some extra welding and what not. No clue on where I guess we'll have to get a few people to climb under their cars and do a comparison of the welds (if they're visible that is).
It'd be interesting to find out what the differences are to see if they can be duplicated or rectified by aftermarket bits.