This would be incredibly slick, and so totally Google, if true. Overnight some, but not all, Twitter notifications to my GMail account started going into the Spam folder, which has never happened before, not in the 2.5+ years I've been using Twitter. Each of the notifications that got marked as spam turned out to be for bambibot/spambot accounts with few or no followers, following a ton of people, sending out lots of spammy links.
That would be a pretty freaking cool process, if Google were in fact able to distinguish those accounts ... and if so, maybe they could/should share their algorithms with Twitter and help defeat these spammers at the source.
Edit: may have to scratch that GMail theory, I'm getting more spam follow notifications in my Inbox ...
