A WebmasterWorld thread has some discussion over one member spotting a Google IP address navigating through his site. The IP address originates from the Mountain View location and resolves to Google, so he is convinced a Googler is manually reviewing his site.
Well, it can be a manual review or it can be a Googler interested in your site. Maybe the Googler is using your site like a normal user? Maybe? If you think not, then maybe your site should be manually reviewed?
Heck, Google's people are all over this site all the time. Here are some stats from Google Analytics where I try to isolate Googler's on my site (I am sure it isn't 100% accurate):
Here is a chart showing "network location" for the past 30 days or so. Notice all these Googlers on my site:
Here is a chart showing my visitors from the Mountain View area, the location of Google's headquarters.
So am I being manually reviewed or are Googler's just reading this site? Maybe both. :)
Forum discussion at WebmasterWorld.