Andylew - 3:10 pm on May 26, 2010 (gmt 0)
Definately on to something with a server upgrade (allthough time will tell if it is related to mayday) now looking at 36 distinct googlebot ips on the site concurrently! In comparison the 'massive googlebot activity' reported just after mayday was relating to around 5 ips up from 1-2 concurrant in april.
I wonder whether mayday was in fact a speed update, ie sites were lost from the top ranks if google couldnt crawl them quickly enough to give them credability. Ie a large site that could only be crawled at the rate of a small site would be of less worth as new content could take months to find and therefor be outdated. Also a large site that could only be crawled at a rate of a small site would have less credibility - harware infrastructure missing to support such a number of pages so unlikely to be seen as authorititive.