comScore on Wednesday reported that U.S. consumers spent $42.5 billion from desktop computers during the first 44 days of the November-December 2014 holiday season -- up 15% compared with the same days last year.

The week beginning Dec. 8 posted strong growth, reaching $8.6 billion in online desktop sales -- up 12% compared with the year-ago days.  For the second consecutive week, Monday through Friday reached more than $1 billion in online desktop sales, marking the first time the numbers rose to the amount twice in the same holiday season.

"Despite a slight deceleration in growth rates during this past week, we still observed strong spending in total with five more days surpassing $1 billion in sales to bring us to fourteen for the holiday season to date," comScore Chairman Gian Fulgoni said in a statement. "While it's not uncommon for the week after Cyber Week to experience a relative lull as retailers pull back on promotions and consumers catch their breath before the final gift buying push, it is encouraging that the 15% spending growth rate for the season-to-date remains slightly above our forecast of 14% for the season as a whole."

Fulgoni expects one last surge to occur early next week in online buying leading up to Free Shipping Day on Dec. 18, and then the online holiday shopping season should begin to wind down.

While smartphones only represent 10% of all revenue last week, the total revenue gain was 107% from holiday week 2 in 2013! Mobile devices (smartphones and tablets combined) represented 43% of all traffic, per MarketLive.

MarketLive -- which powers many retail eCommerce sites, including Armani Exchange, Party City, Perricone MD, Sport Chalet, Sundance, Helzberg, John Deere, Title Nine, Intermix and others -- saw year-on-year average order values rise nearly 4% during the first two weeks of the holiday shopping season.