After launching on Monday, iOS 6.1 is already being used by nearly 22 percent of users monitored by one Web content firm, setting up Apple's newest mobile OS update to be the most quickly adopted to date.

From Apple Insider:

Data collected by Onswipe, a web content creation company, shows that as of 3 p.m. EST Wednesday, iOS 6.1 has been adopted by 21.81 percent of about 13 million iOS users observed from sites using the firm's technology, reports TechCrunch. The adoption rate has been strong, going from 11.35 percent in the first 24 hours of availability to 16.92 percent earlier today.

Breaking down updates by device, the iPhone was at 23.92 percent, while the iPad peaked at a slightly lower 20.90 percent. The overall 21.81 percent adoption factors in all iOS devices including the iPod touch.

 iOS 6.1 sees 22% adoption in less than two days, could be fastest ever