Apple’s latest update of its mobile operating system, iOS 5.1.1, provides several bug fixes and security improvements to its users. Chitika Insights observed adoption rates during the first week of release in a previous report, and now looks at updated data to examine adoption rates three weeks post-release. The three-week overall adoption rate of 57.9% represents an exponential increase in rate of adoption when compared to the 12.3% adoption in the first week. But notably, this is dwarfed by the adoption rate of iOS 5 in October of last year, which was installed on 20% of iOS devices in its first week.