I think BITCOIN4X has told us one thing with a comparison of those two screenshots - but if any of us need something more convincing, ask Google+ to sign the message or perhaps display the account email. I don't need to force him to do that – but maybe he needs to clear his name.
Signing a bitcoin message does not prove on whether, he tried to sell the account or not. It only proves that he is still in control of the account. So if he a ttempted to sell the account and then failed to do so. He can easily sign the message.
Otherwise, the screeshoot seems doctored though the way Google+'s profile lay out appears is different from how most profiles appear including Theymos' simply because his profile contains no Bitcoin address.
There's some history of password changes Google+ has made so far based on bpip - but I don't see him having changed email in the last few months. But since email is private for some users - then I'm not sure we need to require them to post it publicly.
BPIP does not record email address changes.