exactly. and vegas in particular has the best odds in the nation. It's more typical of indian/riverboat casinos to ratchet up their house edge. vegas you're more likely to see 99% payback machines (of course it varies). They'll do other things to make up for it though, like having fewer $5 blackjack tables and more $25 minimum tables.
vegas can afford to turn their hold percentage much lower because millions of people go there every year and there's competition. Versus a lone indian casino in california's central valley.