This is a bit unusual. I got an email from AMD PR this week asking me to correct the Bulldozer transistor count in our Sandy Bridge E review. The incorrect number, provided to me (and other reviewers) by AMD PR around 3 months ago was 2 billion transistors. The actual transistor count for Bulldozer is apparently 1.2 billion transistors. I don't have an explanation as to why the original number was wrong, just that the new number has been triple checked by my contact and is indeed right.
The total die area for a 4-module/8-core Bulldozer remains correct at 315mm2.
-AnandTech
Sources:, AnandTech, TechPowerUp!

I would like to think this was simply a mistake on the part of AMD's PR team, and everyone else knew what was going on.