Kindle Fire owners keenest Android app users

Amazon's Kindle Fire has grabbed more than a third of the overall Android tablet usage activity in less than three months on sale.
That puts it on an effectively equal footing with the Samsung Galaxy Tab family. The latter's January 2012 app activity share is 35.6 per cent.

Back in the previous November, Samsung had a commanding 63 per cent of app usage. But it's not the only one to lose share to Amazon: Asus' Eee Pad Transformer and Acer's Iconia Tab family all saw their shares squeezed after the Amazon advent.
http://www.reghardware.com/2012/01/30/amazon_kindle_fire_becomes_android_tablet_with_highest_app_usage/