Online sales jumped 30.3 percent this Cyber Monday compared to a year ago, reaching an all-time high. That figure comes from IBM Digital Analytics Benchmark, which tracks more than a million e-commerce transactions a day from 500 retailers nationwide. Digital shoppers hit the internet marketplace hardest around 11:25 in the morning eastern time. And more than 18 percent of them did it using a mobile device. Most of the time, it was an iPad.