It's a prospect rating, so if Strasburg turns out to be a better talent, he's right, if not, he isn't.
Of course another possible outcome would be that Strasburg has his career derailed by injury and we never can really make the comparison. (knock on wood)
I don't have much problem with prospect ratings, when they're talking prospect vs prospect. Opinions are wide and varied.
But when they start comparing prospects to
proven MLB talent, that's another story.
It's even a stretch to rate him above Lannan at this point. But when someone rates him above Zimmerman, arguably one of the top 20-30 players in the game ? That's nuts.