A couple of weeks ago, Chitika reported that over 80 percent of iOS Web traffic across its ad network in North America had come from devices on iOS 6. Specifically, the analytics company found that iOS 6.1.1 already accounted for as much as 1.4 percent of the same just 24 hours after its release. Now, Chitika has come up with a follow-up study, this time taking iOS 6.1.2 into consideration.

To quantify the study, the company again sampled millions of mobile ad impressions originating from all types of iDevices on the Chitika Ad Network. This data set is composed of impressions from the U.S. and Canada, observed from Feb. 19 to Feb 24, 2013. That’s a little under a week following the release of iOS 6.1.2.

See the line graph and the pie graph below for Chitika’s findings concerning the version distribution of iOS after the debut of iOS 6.1.2.

Chitika’s updated iOS version distribution

Chitika explains:

As seen in the graphs above, five days following iOS 6.1.2’s debut, 34.9% of iOS Web traffic in our North American network is generated by 6.1.2 users. This makes 6.1.2 the most popular version of iOS domestically, surpassing iOS 6.1.0, and adoption of the OS shows no signs of slowing down. Additionally, looking at the line graph, one can see how the growth in iOS 6.1.2 traffic has been accompanied by a near-corresponding drop in iOS 6.1.0 usage, indicating that many users from that OS in particular are switching to the latest version.

Apple released iOS 6.1.2 to fix a widespread Microsoft Exchange bug that could lead to increased network activity and reduced battery life. Chitika notes, “As this latest update fixed a battery life issue ― a major phone feature ― it’s understandable that the rate of adoption for iOS 6.1.2 would reach these levels so quickly.”

The latest version of iOS was expected to also fix the lock screen security bug discovered two weeks ago, but didn’t. Instead, Apple is set to fix the bug in the upcoming iOS 6.1.3, whose beta was already seeded to developers last week.