Originally Posted by Lemonhead 
Didn't Bethesda/Zenimax handle the QA for New Vegas?
I read somewhere, maybe on Sawyer's formspring, that Obsidian has an internal QA team that took a pass but Bethesda handled most of it.
Honestly New Vegas wasn't buggier for me than Fallout 3 or Oblivion. Reviewers bashed the game either because it was Obsidian, so it was "allowed," or just because the third similar game in a row should be more polished, not the same or slightly less.