After its release on Sept. 19, iOS 6 notably achieved a 15% share of all iOS traffic in its first 24 hours, and saw an adoption rate of over 50% after only two weeks. Now that's up to 60%, according to Chitika Insights (www.chitika.com), a full-service on-line advertising network serving over two billion monthly impressions across more than 80,000 websites.

To quantify this study, Chitika Insights took a sample of hundreds of millions of mobile ad impressions coming out of the Chitika Ad network ranging from Sept. 19 to Oct. 19. The growth rate of iOS 6 was then compared to total iOS Web usage using a time series to illustrate the rate of adoption of the new OS.
iOS 6 growth has decidedly leveled out over the past week, although it still is growing. Since Chitika's previous study on Oct. 2,, iOS 6 gained nearly 10% usage share, now constituting 61% of all iOS traffic.

"We expect small gains for the OS in the coming weeks, with the possibility of iOS 6 usage touching 70% once adoption peaks," says Chitika. "The upcoming release of the iPad mini will likely accelerate this process."