No. I wan't trying to be funny, but people often laugh at me.
I see your point, though, so a few more details... from my faulty memory...
The patter is about "marked cards", but the very subtle marking you can see on the back of those three red cards is not revealed until the end, as a kicker. The faces of the marked cards correspond to the markings - Ace, two and three of spades. One of the blue backed cards is actually a DB.
The method involves a lot of E*****y C****s, I seem to remember.
Thanks,
Guy