I just re-did my Avant Dernier test with the 1,000 eight-deck wizardofodds.com shoes. This time around, I’m finding that Avant Dernier (the bet before last) actually wins slightly more than it loses, but not by much — 134 hands out of 73078 (or 0.18%). Last Bet surprisingly does a little better — 181 hands out of 73079 (or 0.24%).
Baccarat for all intents and purposes is 50/50, but it appears that using either system is better than just randomly guessing.
Avant Dernier (73078 hands. Ties removed).
Last Bet (73079 hands. Ties removed)