That is to say, I'd be very surprised if there are any undecided veterans at this stage of the game,and even more surprised if those few chose BHO over McCain.

That being said, this is politics we're talking about, after all. The nature of the game is to attack your opponents strengths, tarnishing their image such that a lingering sense of doubt persists up until the election. The GOP did the same thing to McCain in 2000, so this is hardly a shocking development. Really, did you expect McCain to get a free pass this time around?