On June 24th, all the tools tracking Google's search fluctuations began lighting up. MozCast, SearchMetrics, SERPS.com all went nuts. Algoroo seemed calm, which is interesting.
Truth is, most of the chatter and discussion I see in the forums are about the tools showing an update happening but not of webmasters or SEOs claiming their rankings changed. Of course, we have some webmasters claiming changes, we do every day, but not the number I'd expect to see when there was a large update.
Here are screen shots of the tools:
Did you see major changes in the past couple of days?