I was reading this article - http://www.informationweek.com/blog/main/archives/2008/11/is_the_iphone_t.html#community
I thought my comment waranted posting here as well.
Also your quote should state "when it comes to viewing 'admob' advetisements"
With only 6000 websites this is such a small sample that the data is a poor representation of the total market.
I know it's cool that Admob release this data but I really wish they did so with a more realistic explanation, iPhone definately isn't the number 1 phone in the world.