VIP masters have been checked up members with 40 posts, those also that have Zero posts are next to go on the 28th February, I am still thinking about moving VIP Masters with <10 post to Verified users.
With Masters, I have not done yet, and I know there Priority members in there as I moved some there like Pongo, Sonyc.
Anyway I am doing a lot of checking still have 12000 out of 14000 one posters to check, and I am only in 2010.