So say the latest CTR stats from the Smaato agency
Four billion ad requests from 35 networks were served in the Smaato network of more than 3,000 registered mobile publishers in February 2010.
Smaato says that its metrics show that the average worldwide ad network fill rates remained constant at 29 per cent during the month.
The fill rate is measured as the percentage of ads delivered per ad request and varies by different factors, including country, device and content type.
Smaato's Index also provides a breakdown of click-through rate (CTR) data, segmented according to OS, and this is where it gets interesting.
Symbian is as you would expect way out in front with a CRT of 147 (the Smaato Index average is 100), with Android second at 110.
Article continues belowAdvertisement
The real surprise, however, is Windows Mobile bossing iPhone/iPod Touch with a CRT of 91 compared to 89 for Apple's devices.
Smaato says this represents the first time iPhone/iPod Touch have dipped below the average Index of 100, and the first time that Windows Mobile has edged ahead of its rival.
In December 2009 the iPhone posted a CTR Index of 119, sliding to 104 in January 2010.
