well, probably more LSI indexing, more pages from the web....very similar in what concerns to my search terms, more branding as well...
Well I notice some changes.. (1) Results are coming faster (check time at right most corner) (2) Found filtration in SERPs (I mean... I found improvement in my search results) (3) News results are frequently updated
Seems to rely more on CONTENT for the SERP algo. For example, "Non-Cheesy Wedding DJ" (went from #38 on Old Google to #3 on Caffeine). The word "cheesy" doesn't appear in my meta-tags or title tags. Its only in the content!