Gators4012 said:
Does penetration really make that big of a difference?
I'll take a shot at this one. First, the answer: all other considerations being considered equal between two games, penetration is the single most important factor.
An extreme example: Consider a single-deck game, heads up. At one table, the dealer is only dealing one round. Obviously, a card counter cannot win at this game. You can never vary your bet with the count, because as soon as you've seen some cards they are redealt. Likewise, you can't vary your play with the count either. The cards you see on the first round, heads up, simply factor into Basic Strategy.
Now, at another table, the dealer is dealing down to the last card before shuffling. Think about the last round of play, when there are only enough cards left for that one round. You've seen the entire deck so far, you know ALL that information. If you had a computer, you make the perfect play because you would know exactly which cards are left, and once you have your cards, you would know with a high probability what the dealer's hole-card is. Obviously, we don't have a computer, just our brains. But keeping a count does give up a lot of information. If the count is high, we know that high cards are left for this round; if it's low, we know there are mainly low cards left. We can bet and play accordingly, and make an absolute killing at this game (which is exactly why you can't find a single-deck game dealt down to the last card).
The same goes for a six-deck shoe. The deeper the penetration, the more information you will have at that penetration level. The count will mean more, because more cards have been seen: in other words, the TC will deflect more. You will have a higher percentage of higher (and lower) counts with deeper penetration than you will with less penetration.
So, all other things being equal, penetration is the single most important factor for a card counter.
(A shuffle tracker will tell you they actually want
less penetration, but that's a different story...)