According to new data from comScore, 6.8% of Web traffic in the U.S. comes from “non-computer” devices such as smartphones and tablets. This is an increase from 6.2% in the previous quarter.

Phones account for the majority of non-computer traffic. Mobile devices drive 4.4% of total digital traffic, tablets contribute 1.9%, and other non-computer devices send 0.5% of traffic.

The comScore data come from a recent report entitled Digital Omnivores: How Tablets, Smartphones and Connected Devices are Changing U.S. Digital Media Consumption Habits. The white paper is available for free (with registration) from comScore’s website.

We reported earlier this year that worldwide mobile data traffic is expected to increase 26-fold to 75 exabytes per year (!) by 2015. That’s 19 billion DVDs, just to give you a sense. To put it another way, that’s 75 times the size of the entire Internet in the year 2000. The mobile revolution is underway, and it behooves those who make Web content to get onboard.

How do you split up your Web use between desktop/laptop, mobile and tablets? Tell us in the comments.