Earlier this week, TechCrunch shared data from touch-based website developer Onswipe showing that, based on its user base of over 13 million monthly active users, over 21% of iPhone and iPad users had updated to iOS 6.1 in the first two days of availability.
We've since followed up with Onswipe to see how the share of users on iOS 6.1 has moved over the past several days, and the firm tells us that it is now seeing over 26% of users running iOS 6.1 just four days after its debut.
Onswipe CEO Jason Baptiste noted earlier this week that the rapid rate of adoption for iOS 6.1, which appears to be the fastest in history for Apple, is likely due to user comfort with the company's over-the-air updates, introduced with iOS 5 in October 2011.
The rapid uptake of iOS updates contrasts strongly with Android devices, where mobile networks are responsible for updates and just 10% of users are on the latest Jelly Bean versions, first introduced last July. The majority of Android users are still using Gingerbread, which dates to December 2010, or earlier versions of the operating system.