I've got a much smaller portfolio these days (thank god). Looking at it though, there have certainly been some changes. It isn't like the penguin update but it looks like a bit of a refresh. Websites of mine with some dodgy links are done, others that have a much cleaner backlink profile are well up. In some cases that is ALMOST annoying, I'm going to have to make a few changes. Google has picked a strange, strange page to rank for a keyword on one of my sites. I have no idea why the algorithm chose that one, for gods sakes, but now I'm going to have to edit it since it is the chosen one. Sigh.