i do it, on the riverboats around here... they use 6 decks, and have automatic shufflers... it wont make u rich, but unless u sit down w the table max and can do it to perfection, its not really much of an advantage... I have made more on BJ plus 3. the plus 3 supposedly hits 1 out of 11 and the payoff is 1 to 9, so if i go 15 hands w out seeing it, i start playing it.
the card counting has to be in teams, to control all the table action, and to control the varience, cuz just because there more 10s n the deck, doesnt mean u automatically win... and im pretty sure I saw one team here like a yr ago, they got kicked out but walked away w had to be more than 20k, I heard rumors about 50k.