Nope. He was brought up too soon. Hitting fine with a sample size of only a month offers us absolutely nothing. And if the league adjusts to you and you can't adjust back, and cant seem to find it in AAA when you go back down either (he still can't pull the ball worth a damn), you came up too fast. Not to mention, his defence was nowhere near ready - he was dreadful. He wasn't ready offensively and especially defensively.
I forget where I heard it (might have been McAdams), but I commented on this the other day - when you fly through the minor league system, the levels never have the time to adjust to you and so you keep skimming along. Then when an adjustment finally happens (especially at the majors), you can look lost which is exactly what he did.
I'm not saying he's finished - far from it, but he clearly wasn't ready. He'll be back I've no doubt.