I questioned Jason (he is VERY knowledgeable about the entire operation) about the distribution center in Texas.
He stated that T-Mobile DOES own this center. He told me that they use the Ft. Worth center for returns. He said that most phones ship out of Kentucky.
For the people asking why Apple is taking so long for delivery. I read an interview with Tim Cook the other day. He stated that demand if very high, and he had NO idea of when they would catch up.
I believe that Apple opening sales overseas (especially in China) has let to a long lead time in the U.S. I think they should have held off international distribution until they could meet demand (wherever they opened sales first). But, I'm not in the position of making those decisions. lol