sem4u - 10:09 am on Sep 28, 2011 (gmt 0)
I have seen quite a few changes since Sunday night / Monday morning. One site is doing really well...up a couple of places for a very competitive keyword. Two other sites have fallen back a little. It reminds me a little of a time a couple of years back when the rankings would fluctuate a lot on a Monday and then settle down for the rest of the week.