jmccormac - 12:00 pm on Apr 17, 2012 (gmt 0)
Google upped its crawl rate on my site in the last few months. It had previously being doing about 250K pages a day and it is now doing around 330K pages a day. However traffic has not jumped and I still get the braindead WMT warning about Googlebot detecting a large number of urls. Not sure if the distributed nature of Google's crawling (a guess here) has any short term effect on recrawling/headers. There was also a robots.txt option to delay Googlebot but that might be a bit more efficient than WMT. As to PR, I don't know about the effect of either a WMT reduction or a robots.txt delay.