No, the Marvel Universe is full of normal people. Osborn has always been a master of spin control, he has more money than God, and he's actually doing a little bit of carefully managed, overpublicized good. It's not beyond the bounds of reason, particularly following an alien invasion, that he might be able to massage public opinion in his direction.
One of the things that handicaps Dark Reign as a story arc is that there aren't any viewpoint characters who don't know the truth about Osborn, so from the reader's perspective, he's not fooling anyone most of the time. The problem is that he's supposed to be fooling everyone without direct, hands-on links to the superhuman community, but we don't see that as readers.