"Whilst Android was busy racing past iOS in the mobile download stakes it was also extending its lead in the advertising stakes too. Millenial have just released new data for their network, which shows continued growth for Android and a very healthy lead over iOS.Android accounted for 56% of impressions by the end of the September quarter, which was double iOS, which had 28%. Even if iOS is trailing Android it is still way out in front of third placed RIM, which could only muster up 13% of impressions. Windows Phone is barely worth mentioning, having just 1% (and that's after being combined with Windows Mobile). 
Android didn't get it all its own way though as the iPad is the dominant force in the tablet world having grown by a mammoth 456% between Q3 2010 and the last quarter with figures in 2011. For its part iOS grew by 60% over the same time period. In terms of manufacturers Apple was also at the top of Millenial's list with a 23.09% share and Samsung brought up the read in second place with 16.48%. Apple was also seeing success in terms of handset popularity across Millenial's network with its iPhone (12.55% share) compared with the LG Optimus in second place with 6.3%." via mobile-review.com