I am not surprised TI went through with it. He's always been provoking the guy, while Flip tries to lay low and not say a lot. But, for sure, you have to give it to TI for willing to take on someone who's probably twice his size.
It all depends on how you learn to fight. There's a way of taking down larger people. Its just that you have to master it.
EDIT: AllHipHop.com just updated its news. Check out the new article. It was posted like an hour ago. Its an update of the Flip/TI thing. It turns out that TI didn't win at all, and it looks like Flip actually won.
http://www.allhiphop.com/hiphopnews/?ID=4239