I would agree with Chuckles.
Looking at the T-Graph figures assigned from the derby, a slight bounce from Barbaro puts him pretty close to Brother Derek territory. Considering Barbaro has always had a month off between starts, a slight backward move or a bad draw that causes him a 3W3W type of a trip could get him beat. Also, their have been several horses that bounced in the derby and then moved forward to win the Preakness(Point Given and Afleet Alex) or paired in the derby and then went forward to win(Louis Quatorze).
So looking at the derby horses being mentioned, is it a big stretch to see Brother Derek or SweetNorthernSaint move forward and make an impact in the Preakness? These horses have run fast enough to win the Preakness and if they get back to their prior fig's, they will have an impact.
I am not saying that Barbaro should not win but if you can get Derek or SNS at 6-1 in an 8-horse field because of it, it looks like a chance to me.
John