At Polynesian, the lagoon view and Magic Kingdom view rooms in the Tahiti longhouse are not so great for viewing the EWP; Tahiti is probably what sixcats was thinking of when choosing to use the word "MOST" (Polynesian lagoon view rooms). It goes right by the other end of the resort but from Tahiti you have a relatively distant view.
But I love Tahiti for other reasons (bigger rooms, 2 sinks, 2nd floor balconies, close to the Transportation & Ticket Center).