Impossible to tell at this point. Sounds like an interesting experiment, certainly.
Why not?
It might lose out on hormonal effects, which begs the question of how well a human-based neural net would cope without the hardware interrupts it's evolved to interface with.
Presumably it would, but you might have to synthesize hormones and the like in order to make it function properly.
It would be reasonable to assume that a neural net copied from a human would retain basic social behaviour, so yes it probably would. Or at least it might try - difficult to say how the lack of body chemistry would affect one's feelings and emotional life.
We don't know if we do or not. We have little to no idea what we actually mean by the term "intelligent". On the surface of it, it strikes me as little more than a term we've invented in order to make ourselves look more l33t.
Cheers Bent D