User blog comment:General MGD 109/How Strong Are Ghosts?/@comment-3481504-20120710193327/@comment-3481504-20120710205518

We obviously disagree on this. He actual did overpower them pretty easily, but he was stopped. Some ghosts are stronger than others, Vengeful ones like Bobby and High-class ones like Van. It's really that simple. Oh, and part of it could be the writers, I mean if they let the ghosts beat the Winchesters, it's likely result in their death, and there would be no show.