I have a friend who has been playing blackjack as an experienced counter for several years now. On top of basic Hi Lo he employs the method of counting 7's and 9's as well (7s of course being plus 1 and 9s neg 1). He ignores the 8s always. He said he has found it to be more effective than excluding all 7-9. He had never heard of anyone else using this system and today I found that the MIT team actually does after reading up more on the documentary. My question is to some of the more experienced players in their opinion of whether they believe this method is a more effective one, could work against you or basically makes no difference?