jk3210 - 4:09 pm on Apr 26, 2012 (gmt 0)

From looking at the sites that post in Google Groups about getting nailed in this update, it appears to me that most of them had their spammy links for quite some time --even for years-- which would indicate that Google has now begun penalizing those links, where they had previously simply discounted them.

I imagine a lot of "marketers" didn't get much sleep last night.