This article seems to elude to the iPad 2 having Gorilla Glass. Wonder what her sources are?
http://www.appleinsider.com/articles/11/03/14/supply_issues_estimated_to_drive_cost_of_apples_ipad_2_touchscreen_up_to_127.html
http://www.appleinsider.com/articles/11/03/14/supply_issues_estimated_to_drive_cost_of_apples_ipad_2_touchscreen_up_to_127.html