while I think it is silly to speculate on whether this stuff actually happens or not (what's the point?), I personally have no doubt in my mind that it is possible, and that some individuals are very capable of, and have acheived levels of mastery compared to which bending a spoon is child's play.
I think individuals who reach these heights are on much higher planes of consciousness (relative to ordinary people), and whether the world is impressed with their "abilities" or not is of absolutely less than zero consequence to them -- in fact, they probably make sure that it is hidden from the public, whose lower spectrum energy fluctuations can only hinder them on their quest.
in most Tibetan temples levitation and flight is within first year's study -- it's like, newbie freshmen boring crap to them.