Until we have some type of hard evidence this is all just rampant speculation.
Also There is the issue to consider that the stonework is perhaps the only tangible surviving relic.
Other factors support the theory such as folklore, ancient art, ancient religion, and dare I say even evidence of hybridisation (elongated skulls).
So it is by no means simply an issue about stonework.
However that is an excellent place to start which is why I have made a big case for it by looking at Peru, Easter Island, Egypt, and now Turkey.
Confirming logistics (there's that word again!) all tie up.
Edited by zoser, 24 February 2013 - 12:01 PM.