Recently there have been several reports starting to show that tablet (iPad) traffic is beginning to overtake smartphone traffic. For example, a report last week from Adobe found that, on a global basis, tablet traffic now exceeds smartphone web traffic (8% to 7%).
A new report from ad network Chitika, however, says that at least in North America the iPhone still generates roughly 2X the web traffic of the iPad. The iPad dominates tablet-only traffic with more than 80% market share.
In late February, Chitika looked at traffic distribution from "250,000+ publisher websites." The company found that "iPhone users still generate more than two times the traffic of [ ] iPad users."
The iPhone was responsible for 61.5% of North American web traffic from iOS and the iPad for just under 31%. The iPod Touch drove roughly 8% of iOS-generated web traffic according to Chitika.
The Chitika report didn't look at engagement or time on site. The earlier Adobe report found that "on average internet users view 70% more pages per visit when browsing with a tablet compared to a smartphone."
As tablet penetration grows, we should see its share of iOS and all web traffic commensurately grow. The interesting question is whether tablets are substituted in the home for smartphones or PCs. A recent Google-Nielsen report found that 77% of smartphone search activity happened at home or in the workplace (when people typically have ready access to PCs).