The 2013 holiday shopping season started with a resounding bang as leading online retailers experienced a 25% increase in revenue during the five-day period leading up to Thanksgiving compared to last year.

While same-store traffic to leading ecommerce websites increased just 10.14% compared to last year, revenue jumped 25.21% and the number of purchases increased 14.91%, according to our analysis of more than 100 million online shopping sessions, Nov. 23-27.

The biggest impact when comparing the same five days leading up to this Thanksgiving Day to last year was made by consumers on tablets with traffic increasing 46.99% compared to 37.16% on smartphones. Traffic from traditional desktop and laptop computers dropped 2.63%.

Equally impressive are year-over-year revenue gains from tablets (50.68%) and smartphones (42.28%). While revenue from shoppers on desktops and laptops increased 21.21%, the biggest gain in conversion rates came from traditional computers (17.70%) compared to tablets (14.59%) and smartphones (7.25%).

So far this holiday season, social media is also making a big impact, referring 38.74% more traffic than last year, driving 36.56% more revenue with a 42.58% increase in conversion rate.