[rottendevice]

"Feel free to point me to a list of high quality in XNA produced titles."

If you want to develop a game on WP7, you HAVE to use XNA. All games in the WP7 app store had to be built with it.

Also, WP7 has no C++ support. John Carmack griped about this on Twitter.

[tomh-]

That is exactly my point, why develop for WP7 if you can work with the technologies you want for other platforms which also have a higher userbase?

However I suspect that some of the titles from companies such as EA or Gameloft are still written in C++ even though it is not supported officially by Microsoft. It is highly likely that they have some kind of early access to native code compilation for the platform.