I just learned that after five years of counting, I don't know what I am doing. I can count down a deck of cards in under 15 seconds easily. But I can't tell you that the last card remaining is a 7, nor can I tell you its suit.
That was the only thing that made me puke. Rest of the show was not that bad, although I notice they played down the law suits, backrooming, etc.
But about that seven of clubs? Are they really trying that hard to make card counting seem like something that is beyond most everyone? That it provides almost super-normal abilities (Rain Man type ability) or something??
...Called the modulo 10. This follows baccarat-type scoring where all cards count face value and you subtract 10 from any number greater than 9, eg 6+7=3, 5+9=4. It is relatively simple to use accurately if you are dealing through a pack one at a time, allowing you to accurately predict the last card. I used it for a TV promo on card counting once.
It would be relatively simple to develop a similar system to incorporate suits, though ultimately, what you have is a relatively unimpressive magic trick. We are not magicians, what we do is real but unspectacular showmanship.
Arnold Snyder has a funny story about such a count. Never gave it any thought as to whether it was fact or fiction, but he had a story on his web site about it... The punch line was that while he could tell the _exact_ remaining cards, it couldn't be used in a real game.. :) Turned out to be too much information to quickly reduce to a single playing decision number...