another new person thegypsy (the third one?!) claims that OS were penalized for something that he cannot disclose
No mystery here - thegypsy is not "new", he's been a member since 2006. He was one of the first to discuss Google's phrase-based indexing patents [webmasterworld.com], for instance. In addition he's well known and respected in the larger SEO community.
He was close to the story because the WSJ reached out to him for technical understanding.