AppleInsider:

Chitika Insights, the research arm of the Chitika ad network, sifted through its database of ad impressions and found that 94.64 percent of all tablet web traffic can be attributed to the iPad.In comparison, the second place Samsung Galaxy Tab only managed 1.22 percent of the market, while the Asus Transformer Prime eked out 1.2 percent.

So much for the competition.