I'm asking this more rhetorically (because I know this is all just speculation), but why is it that Disneyland is going to be able to get their version open within 2 - 3 years from now, while we could be looking at 4.5 - 5 years from now? Disney management just wants it that way? TDO didn't fight for (or even desired) a more aggressive timeframe?
Why even bother to announce both coasts' lands at the same time, then? They could have announced Disneyland's last summer at D23, then waited until the 2017 D23 to announce Orlando's. It all just seems odd to me. Announcing them together, rightly or wrongly, creates the perception that they're twin projects that are inextricably linked. Their claim back whenever it was that both lands had "broken ground" (when, in reality, we were seeing coverage exclusively from Disneyland's construction site) was clearly meant to further their intended perception that both projects were moving along parallel tracks.