Hi Zahi!
As far as I know, the queen size beds (at the Polynesian) were just as big as our queen size beds at home.
The *double* size beds at Coronado Springs were the regular traditional sized double beds.
I think the only variance you'll find is at the Dolphin, where their doubles are supposed to be slightly larger than the standard. We stayed there a few weeks ago, and I couldn't tell the difference!