I have to say I'm leaning toward Hersh here. If the difference in levels is so invisible that after 28 pages none of the fabulous experts here has yet been able to identify it, then to hell with it.
And when you have a rivalry like V/M & D/W, which is generally seen as a rivalry for the ages, both teams quite equal (how many times have I heard this here), and then the tech committee calling levels represents one team's country but not another, then yes, I think you can talk about national bias.
Not so sure about the crowd reaction as the crowd would have given P/B the gold if they could have (and C/J the bronze! lol), but yes, it seemed to me that D/W were underscored on choreo, performance, and interpretation relative to V/M.