Greater China leapt past Europe to become Apple's second largest market in revenue terms during the January-March quarter, and analysts say it won't be long before the region surpasses the U.S. to become the tech giant's top market.

Apple's second-quarter revenue from Greater China – defined as mainland China, Hong Kong and Taiwan totaled $16.8 billion, a whopping 71 percent year-over-year jump. This tops the revenue of $12.2 billion out of Europe, and closes in on the $21.3 billion made from the Americas.