I tried a game last night for Maori. Played large, continent map with high water level seas. So far I can 100% agree with the Civ power rankings; these guys are obscenely powerful. I couldn't get your numbers.
The last game I played was with Pericles so I was already used to swimming in Culture. But I was always kind of broke-ish most game. Not so with these guys. After 7-8 naval trade routes and harbor adjacency spam, I felt like the attached image when faced with a problem.
What really blew me away was all the Great Admirals I was picking up. I literally had fleets in the classical area, with 20% productions boosts in all harbors, and like two Admirals on reserve. They were getting to be a nuisance and then some poor AI Ottomans made the mistake DOW'ing me. I went Lepanto on them, and did what the victors of Lepanto didn't do afterwards and "liberated" Constantinople.