I'm not defending McCain here, but Obama's guys are probably doing the same thing, simply preparing for the future. It's also what newspapers do during elections, they declare both candidates winners, write generally vague articles and print tons of copies. Depending on the winner they send out a specific batch for deliveries, how do you think those papers get to the newsstands so quickly? Printing takes a while.
Also it's not exactly hard to grab some random McCain picture and photoshop that in, just saying...