Apple launched its new mobile operating system, iOS 6, on Sept. 19. A new report indicates that nearly 15 percent of iPhone, iPod touch, and iPad users, who were eligible for the over-the-air (OTA) update, have already upgraded to the new operating system.

"Pre-release iOS 6 exhibited low levels of usage due to developer activity. Following its release during the afternoon of September 19th, adoption levels soared despite high loads on Apple's servers. Yet, within 24 hours, iOS 6 adoption had already reached levels above 15%," stated a report from Chitika, an advertising and data analytics firm.

Chitika Insights based its findings on millions of sample mobile ad impressions that were generated in its ad network within the 24-hour period. The firm also "took a look at the adoption rate of iOS 6 across all iOS devices" to determine Apple's latest mobile operating system's success.

 "The elevated level of iOS 6 usage marks another notch in the line of Apple's recent hits, which given the company's past success, is not surprising," a Chitika Insights spokesperson told Mashable.

The spokesperson also noted that iOS 6 was being adopted quickly due to two major factors: over-the-air updates and the introduction of long-awaited new features.

According to Chitiki, more users have updated to the sixth-generation mobile OS platform, iOS 6, within 24 hours of its release than any other software upgrades in the past. By comparison, iOS 5 took five days to reach 20 percent devices. Additionally, the report also noted that at 15 percent, the rate of adoption for iOS 6 is substantially higher than the 1.5 percent mark achieved in the first two months by Google's Android 4.1 Jelly Bean update.

The iOS 6 reaffirms Apple's ability to effectively manage its mobile ecosystem. The software comes pre-installed on Apple's iPhone 5 and is available as a free update for iPhone 3GS, 4, and 4S users. The new OS can also be installed on the iPod touch (fourth and fifth generation) and the iPad (second and third generation).