A record number of shoppers made purchases online on Cyber Monday, Thanksgiving pushing sales up 33 percent.

Growth was especially strong among buyers using mobile devices who accounted for 6.6 percent of all purchases – triple the percentage of 2010.

The report from IBM Benchmark says the average order rose 2.6 percent to $193.24 when retailers amp up online promotions. The data says about 80 percent of retailers offered online deals.

Online sales also were 29.3 percent higher than on Black Friday.

It says traffic peaked at 2:05 p.m. EST.

Other highlights:

  • iPhone and iPad shoppers led in mobile device shopping
  • iPad users had the latest shop-and-buy conversion rate at 5.2 percent vs. the overall percentage of 4.6 percent.

“Cyber Monday was once again the big winner for the Thanksgiving holiday shopping season, with a record number of consumers focused on finding the best online deals,” said John Squire, chief strategy officer of IBM Smarter Commerce.

“Retailers that adopted a smarter approach to commerce, one that allowed them to swiftly adjust to the shifting shopping habits of their customers, whether in-store, online or via their mobile device, were able to fully benefit from this day and the entire holiday weekend,” he added.

A clearer picture of how holiday sales are shaping up will come on Thursday, when major retailers report November sales.

Morrisville-based ChannelAdvisor reported similar growth figures. Read details here.

Read the full IBM report here.

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