"how many transfers UT normally takes?"
"is there a preponderating majority of transfers coming out of other Texas schools?"
The only person I know who tranferred in came from Tech.
"I am going to UH, but if I do well, say, 10%, better to stay or try to transfer to UT for the prospect of Houston big law?"
If you want big law in Houston and you are at the top 10% of your class at UH it probably doesn't make a difference whether you transfer or not - you're in great shape for a good job in Houston with stats like that at UH. Plus, you have a good shot at Houston Law Review and it's really tough to get on the Texas Law Review as a transfer. It would be a different story if you didn't want to stay in Houston.