The recent Google update that I’ve mentioned a few times in the last couple weeks is now starting to “firm up”, based on what I observe in my logfiles. As I’ve explained before, I’m not an SEO Scientist, but rather an SEO Chef. I don’t study SEO on a detailed basis, but rather make my moves based on observation. I’d liken the way I approach SEO to the way I approach driving a car: I don’t know how a gas engine really works, but it’s never stopped me from being a skilled driver.