blend27 - 8:00 pm on Sep 20, 2010 (gmt 0)
I see the exact same thing on a smaller ecom site, but the Niche Leader.
What interesting is that "SUM of all page views per user sassion"/"Unique visitors" per day balances out about the same over all per day. As if G is sennding less interested people at times during the part of the day.
NO GA on this site either.