To be honest the guy didn't have a thread. Or if he did I couldn't find it. He just posted it in the "What are you working on" thread.
This is the guy: http://www.wesley3d.com/Index.htm
Here was his post: http://www.polycount.com/forum/showp...postcount=7821
From what I understand the t-pose was replaced because generally a character didn't have their arms at a 90 degree angle. It made people who do sculpts be able to make the muscle structure a lot better (as our muscles look different at 90 degrees rather than 45) and like you said, to try to avoid texture stretching.
Again, I haven't ventured in to the sculpting stuff too much, so my knowledge is rather limited.
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