I find it amusing the quick dismissal by the league, the media, and the players that the idea of discrimination against black quarterbacks could even be could be considered, especially when McNabb is among the first group to truly be accepted.
It's not very long ago at all that black quarterbacks were unheard of aside from the occasional Doug Williams, Cunningham and Moon. When the big group came through, there was no conspiracy to promote them, but it was human nature to hope they succeeded. I know I was 'desirous' to see them succeed, just as I am 'desirous' to see the handfull of black coaches succeed since they are in the same situation quarterbacks were not very long ago. Anyone would have to be, unless they were either racist or completely apathetic.
Whether that's still the case a few years later I'd agree it's probably not, but it's certainly not out in left field to be debated (unless you're a league that wants to brush its past aside).