I disagree.
If I were Matt Moore, for example, and I was given the choice between the Bills, with Cassel, and the Jets, with Geno (assuming Vick goes elsewhere), I might be more inclined to go with the Jets, because Geno is a train wreck.
Also, who is to say that Cassel isn't that very same guy you describe?
If there is a better FAQB than Cassel, I want them. So, my original question remains: does the signing of Cassel make it less likely we will get them?