Not quite, but it's a close run thing. They're at least as quick as Babylon through to education (+2 science per city and an academy soon after Theology), and a bit faster than Korea. After that Babs and Koreas bonuses really start to kick in. You can compensate somewhat by utilising your religion and free GP to get you through Rationalism faster than the other pair can manage, bump up your CPT with some pagodas and/or mosques, or pop a writer or artist for extra culture. Also getting the key wonders will make a big difference. Head to head against the Babylonians, the Mayans can get a GE just in time to snag the Leaning Tower and suddenly both civs are generating GSs at the same rate. Babs will still get more because they don't have the Bak'tuns messing up their normal GP generation, but you can use the free GP from the wonder to snag porcelain tower and get another academy down on your way to Scientific Theory.
Your advantage in faith might be enough to yield a few more GP in the late game too.
Anyway, Mayans are a little bit slower, I think, but if you can hit Theology early and get a lot of faith going they can be competitive. Those are ifs though, Babs and Koreas speed isn't contingent on anything.