IBM had released research showing that online shoppers using an iPad were responsible for 7% of all online sales on Christmas Day. Slightly behind the iPad were iPhone users accounting for 6.4% of online sales. That's more than 13% of all online shopping on Christmas Day went through an Apple mobile device. 5% of purchases were made using an Android device.

IBM's report also said mobile devices were used for 18.3% of online sessions on retailers' sites on Christmas Day. That's an increase of 117.8% from last year. Sales from mobile devices were 14.4% of online sales on Christmas, or a 172.9% increase over 2010.

IBM's Coremetrics Benchmark survey looks at the real-time sales data from the sites of more than 500 U.S. retailers. See more on Forbes.