Marval - 10:32 am on Aug 7, 2004 (gmt 0)

percentages - being pretty much limited to one genre of sites I can only speak for my industry, but I'm wondering if some of you can check the "authority" sites to see if they are still holding steady in the top results for your niches. Another thing I had noticed is that these changes are not spread across all datacenters so it might take some playing around to get a good view of it.
As far as the summer slowdown effect - Ive dealt with that every year for 5 years and know what to expect there - these traffic changes, which I can see in the SERPs when I see the right datacenter, are definitely caused by changes in positioning, which I can trace in quite a few cases to some sort of algo change.