That is but one of the challenges they use. This one might not be of interest to you, but what if the challenge was "open an IDE and create a 'hello world' application"? Microsoft's TouchDevelop just may win out on that.
https://play.google.com/store/apps/details?id=com.aide.ui is really, really slick.
I would love to see a race. I very much doubt WP7 could win but I'll be very impressed if it does. Anybody have the appropriate collection of devices and the time to film a demo? :)
>I can build a Hello World app on Android in under 2 seconds.