Thanks for the responses.
I don't actually think those rules are used nowadays.
Where i have played neither NDAS, D9, nor 1spl are applied. The rule "dealer wins ties 17-19" is still applied.
Surely this wouldn't affect the house edge by 4-6%?
I live in Sweden and have recently started practicing card counting. Although i am able to keep track of the count and play basic strategy, i'm not totally sure about the possible percental advantage in card counting according to Swedish rules.
I heard from a friend who is supposed to be a very...