I have to agree with David that maybe it's 17% of the drop which is way way different than 17% house advantage per bet.

Double Zero Roulette is 5.26% house advantage so the drop in that game has to be.....well almost 100% if you stay there and cycle your money through 19-20x

I am guessing we were talking apples and oranges.

If they had a doctorates degree I would have it in blackjack, believe me.