Windows Mobile OS has 4% of the U.S. Smartphone web traffic.
The AdMob statistics do not show handset sales, but rather are calculated by measuring traffic on more than 15,000 web sites and applications.
The Motorola Droid, running only on Verizon, has captured 24% of all Android traffic, even though it has been out only a few weeks.
The iPhone has been on the market for 28 months. That 55% share of traffic is a pretty robust number for such a relatively new product. The Android numbers, especially those of the Droid are also good news for Google, Motorola and Verizon.
The balance of Smartphone data may change dramatically as the holiday season unwinds, and it will be interesting to watch the ebb and flow of the competing brands.
AdMob was recently purchased by Google. Apple also had reportedly had some interest in the company.