Currently Being ModeratedDec 5, 2012 6:35 PM (in response to Urs Gruetzner)
try reindexing a few small groups which you know aren't getting indexed now.
you can selectively index a folder by dragging it to Spotlight Prefs/Privacy, leave that preference, then go back to it and remove the folder from Privacy.
Then watch the logs for errors and run a test to see if results are better.
Not a solution, just a way to narrow things down