Jim Perry:Why?!? It's not like it's difficult to install the runtime. It's no worse than having to install the DirectX runtime for a game. It should take less than 2 minutes. :|
7.31M(XNA redist) is not a small stuff, I think, and secondly, it's quite annoying when you want to play a game, and you have installed an extra runtime.
Most windows user would have the DX runtime installed with the OS, but not the XNA.
But for developing a easy game, the XNA fx is first choice, that I have to admit.