This 17 rule varies from casino to casino. I don't keep
track of it closely because the rules in Colombia casinos
are so good that IMO the S17/H17 rule makes little difference
for anyone considering where to play.
Also, any casino may change the rule at their discretion.
S17 (dealer stands on all 17's) gives a teeny tiny
advantage to the players on some rounds.
Sites such as BJ21 and Wizard of Odds may provide the exact
tiny fraction-of-one-percent advantage to the player v. S17.
The most important player-favorable rules are
double-any-first-two-cards permitted and
Surrender permitted against a dealer Ace or any other card.
Also, casinos in the Paisa capital offer 3-2 payoffs on
naturals, unlike some 6-5 casinos in some northern countries'
casinos.
cccmedia