From the US last week:
Of the 24% of traffic made up by mobile devices, phones contributed 13% and tablets 11% (or 54% and 46% of mobile respectively). Of the phone traffic, iOS devices were about two thirds of traffic and Android one third. Of tablet traffic, iPad was 88%, Kindle and Nook were 5.5% Galaxy Tab was 1.8% and other tablets were 4.4%.
Overall, iOS was 77% generated mobile traffic and Android (excl. Kindle, Nook) was 23%. Besides the pattern of significant mobile growth (from 5.2% to 24% of online in two years) there is the curious effect of iOS growth outpacing Android growth. Android went from 1.43% of Black Friday shopping traffic in 2010 to 4.92% in 2012. In same time iOS went from 3.85% to 18.46%. In other words, while Android is up by a factor of 3.4, iOS is up by a factor of 4.8.