The gif is actually taken from page
33 of this thread. Nobody said it was a foul. A couple of mentions that it could have been a pen had Valencia gone to ground when Baines started pulling on him.
Obviously, the opinion of the great and good on redcafe are unlikely to be completely unbiased (especially when people are talking about a player that's klept one of their favourite players out of the team all season
) but I don't remember any of the pundits on telly saying it should have been a foul and none of the Everton players appealed. Read into that what you will.