Or maybe Peter can only absorb Sylar's 'natural' power. Just the knowing how things work part.
I think he wouldn't have telekinesis, if this was the case, because AFAWK he's never come into contact with the Davis character. I think he was thinking about Sylar and what he did at the high school, and that power was the one he saw. At that time--and this is the reason for his overload, too--he needed to think about the person to use the power.
Since the others are gotten by some other process, perhaps those couldn't be taken.
Maybe we'll get to see them in later episodes.
Stupid part to me is, if somebody was gonna mindwipe Peter they better put him somewhere they don't much care for since he should still have Ted's nuclear power and is still just as likely to go nova again for whatever reason. I mean, do youu steal the knowledge of something like that from somebody but leave them with the means to do it accidentally? When his knowledge of it was requisite for him to strive against the big boom. (Not that he was able to stop it in the end, but...) Unless of course, they were somehow able to take Ted's power away from him. Or (speculation), the 'new' electrical power is Ted's power at a different wavelength somehow because the big boom used up alot of the charge. Maybe he works his way up through energy levels like the firebenders in Avatar (fire, electricity, then radiation, etc
This is an interesting idea, but I still think that Peter was just way too angsty before, thinking, "I'm doomed to blow up New York!", and so he did. Without his mind in the way, his body knew that the "hot" radiation would destroy him, and used something between that and the "bright" radiation that Noah had Ted use when they were captives.
