The Apple iPad accounts for 97 percent of all tablet traffic in the U.S., despite the entrance of highly anticipated competitors like the Samsung Galaxy Tab, Motorola Xoom, BlackBerry PlayBook, Asus Eee Pad, and others.

According to a report from comScore, Android-based tablets took up only 0.6 percent of all tablet traffic, while "other" tablets (in other words, the PlayBook), took up 0.1 percnet.

The figure should come as little surprise given that during a recent earnings call, Apple said it sold 4.69 million iPads in the last quarter and is, according to Apple chief operating officer Tim Cook, facing the "mother of all backlogs."

Apple's competitors now have more than a year and two generations of iPads to overcome. Will upcoming tablets, like the HP TouchPad, and anticipated Windows 8-based tablets, be able to tear through Apple's tight grip over the category?

In recent weeks manufacturers like Acer, Motorola, Research in Motion, and Samsung have all reportedly downgraded their estimates of tablet shipments.

Meanwhile when it comes to smartphones, the traffic landscape isn't as skewed. Android devices take up 54 percent of all mobile traffic, compared to the iPhone's 36 percent and "other" smartphones with 10 percent.

The comScore report also captured tablet traffic around the world. Interestingly, the iPad dominates 89 percent or more of the tablet traffic in 13 countries (note the 100 percent in Japan!) BusinessInsider has created the following chart based on the figures:

ComScore's report is part of a new "Device Essentials" series that measures traffic coming from page views of more than a million domains around the world.