Not sure it's NL and Omaha... sometimes seems to be that they'll play Omaha like they'll play Holdem, only seeing more
hands ... one thing to note is the number of rounds of betting means that Stud and Razz can be more expensive hands to play, which can skew them a bit, but the upside is as mentioned where people don't know enough to fold 3 paint upcards in Razz...