When Penguin came out, the first thing that I thought was that Google made Panda a new best friend. If you're going to look at things that way, Panda = quality; Penguin = anti-spam. Add them together, and you have a good place with good content, free of spam. Oh, and I wouldn't say "most" websites, because it only affected 3% of the queries. Well, you could say that "most" got hit because the ones we know have been hit. I'm feeling that this cycle, as shown in mackyanderson's image, will go on for a long time until Google finds away to completely eliminate spamming.