Data compiled by advertising and analytics company Chitika appears to suggest that the launch of the iPhone 5 in China is what caused the operating system's usage to surge.
Previous figures released by marketing firm MoPub showed that iOS 6 global adoption was up 30% since the re-release of Google Maps, but Chitika's stats suggest adoption rate in the US and Canada during the period in question was flat.
The iPhone 5 went on sale in China on December 13, selling 2 million units in its first weekend on the market after racking up hundreds of thousands of pre-orders.
"Customer response to iPhone 5 in China has been incredible, setting a new record with the best first weekend sales ever in China," said Apple CEO Tim Cook.
"China is a very important market for us and customers there cannot wait to get their hands on Apple products."
China is Apple's second-biggest market after the US, accounting for 15% (£14.7 billion) of the company's total income in the fiscal year that ended in September.
iOS 6 global adoption is expected to see further gains over the coming week as the iPhone 5 will be available in more than 100 countries by the end of December.