Note that the data collected until mid April was from websites catering primarily to a US audience, and thus did have a bias.
Currently Akamai IO includes statistics on browser usage, and related trends, on fixed & mobile networks. Going forward, we plan to:
On Feb 16, 2013 we've switched to a new global data steam which provides more sampling data with improved accuracy. We’re still working out some of the kinks in this new data stream, trying to understand various weird patterns, but overall the new sample set is broader and a better representation of the internet.