@war_killer: if that even is Coulson...I still think that he's an LMD or something or at the very least he's been brainwashed for some unknown reason...the " It was magical" everytime someone mentions Tahiti just screams BRAINWASHING
Oh, the moment Maria Hill mentioned how he could "never know" and the doctor saying" he really doesn't know" just screamed that Coulson was an LMD. That's probably why he doesn't say anything else about Tahiti, because he's only programmed to believe he was there "recovering" from Loki's attack, but in reality he probably was only brought online sometime after his death.
But really, it the comics LMD's were programmed to believe they were really the person they were pretending to be, even after the realize they're an LMD they still be believe they're the person they thought they were. I have a feeling that Skye's going to figure out that somethings up with Coulson and when he tries to remember his time in Tahiti he's going to figure out what's really going on.
I'll be severely disappointed if Coulson turns out to be an LMD. It'll feel like such a cop out, rather than trying to be a little more creative with his return. I mean, this is the Marvel Universe, where numerous Magical and Cosmic beings exist, there's so many ways they could resurrect him instead of just going the "He's a Robot" route.