"This is phenomenal," Cook said. "This is the fastest software upgrade rate in history, that we're aware of."
Cook also disclosed other new, mostly eye-popping numbers across the range of Apple's product lineup:
" Apple sold its 100 millionth iPad two weeks ago--just two-and-a-half years after the product launched. "That's unprecedented for a new product in a new category," Cook said. And the tablet seems to be trouncing its competition: The iPad accounts for 90 percent of all tablet-based Internet traffic.
" More than 5 million units of the iPhone 5 have been sold since its recent launch. "It's the fastest-selling iPhone ever," Cook said.
" The latest version iPod nano and iPod touch, he said, have joined the rest of Apple's iPod lineup to sell 3 million units. "Sales are going fantastic," Cook said.
" Meanwhile, users of Apple's Mac and iOS devices have combined to share 125 million documents in the cloud; they've also shared more than 60 million photos using the new shared photo streams service. And iMessage users are now exchanging 28,000 messages per second.
" On the iOS platform, Apple's iBooks application now has 1.5 million books available; more than 400 million books have been downloaded since the app's launch. iBooks textbooks, Cook said, are now used in more than 2,500 classrooms nationwide.
" And the broader App Store now contains 700,000 apps, including 275,000 made specifically for the iPad. Customers have downloaded more than 35 billion apps, and Apple has paid out $6.5 billion to app developers.
" The Mac product line has done pretty well, too. Cook said that for the year ending in June, its sales outgrew the PC market by seven times--the sixth straight year Apple has outperformed the market. The result? Macs are the No. 1 desktop and laptop computers in the United States.