I have a few free Windows Phone 7 apps in the marketplace. Since Windows Phone 8 shipped I've seen my download rate increase ~50%, and it seems like around 30%

I have a few free Windows Phone 7 apps in the marketplace. Since Windows Phone 8 shipped I've seen my download rate increase ~50%, and it seems like around 30% of my active users are running WP8. I'm not making any money with these (just fun projects for me), but its a datapoint FWIW