aristotle - 10:03 pm on May 9, 2010 (gmt 0)

The last week was the biggest single change in our referral profile graph since florida 2004. Anyone else seeing major changes in referral numbers since the new serp layout last week? (this is not about the algo update, but specifically with the new serp layout)

I can understand how the new serp layout could cause a noticeable loss of traffic. For example, the 5% drop mentioned by steveb seems reasonable to me. But I don't see how it could cause "major changes".