Thank you, Rob!
So far the only staterooms I have experienced were on Decks 4, 5 and 6, whose floorings are indeed rubbery-plastic, too. You're right, the forward "propeller blade deck" is not teak either.
Could it be that only a few suites on Deck 10, 11, 12 have real teck on the balconies?
Personally I doubt it, I would think plastic surrogate is better in terms of weight... and probably cost.