You're right about context. Those 12 games include the numerous times that Still inexplicably subbed him off when he was clearly the best player on the pitch. It's only in the last handful of games that he's really started to show just how good he is. And, as others have pointed out, the stats don't record him as providing the assist for AA's goal on Saturday, despite the fact that it was his run from inside his own half that created the chance. So those numbers really are meaningless.
It's entirely conceivable that none of those 4 teams mentioned will even be in the PL next season. I guarantee you that when he leaves us, it won't be for another Championship club.