Online holiday spending up 15 percent from last year

Christmas Day in particular saw a heavy spike in the purchases of digital content and subscriptions, which includes digital downloads of music, TV shows, e-books, movies and apps. Consumers enjoying new smartphones, tablets, computers and gift certificates are credited for driving the purchases.

On a typical day of the 2011 holiday season, digital content and subscriptions account for about 2.8 percent of e-commerce sales, but on Christmas Day that number ballooned to 20 percent. That category should remain elevated for this whole week if past trends hold.