Although it was mentioned at SES NYC by Matt Cutts and Craig Manning (of Google), this incredible revelation was still an "untested theory" until Damalo at SEOChat posted an incredible scoop - SERPs quality team - EU center.

Thanks to this tidbit of information, it is hard not to come to the conclusion that there absolutely is a manual review process for the sites that appear "abnormal" to Google's crawler/indexer. I assume this to be part of a massive quality control mechanism that will be done partially by humans. SEOs should be even more wary than before - content quality, usability & design are about to become more important than ever before.