The new iPhone flew off shelves, selling more than the iPhone 4S did in its first weekend.  So why is Apple stock slipping?

FOX News Radio's Lisa Brady reports:

FOX on Tech.

Apple fanatics love the iPhone 5.

(iPhone Fan) "Light years ahead of any others."

Lining up for the big launch.

(iPhone Fan) "Actually, it's prettier than I thought."

But pretty doesn't necessarily "beat the street," and there had been estimates Apple would sell up to 10 million in the first weekend.  So sales topping five million fell short, but the disappointment may be partially self-inflicted.

Apple says demand exceeded the initial supply, which sold out.  CEO Tim Cook says stores will continue to receive shipments regularly, and customers can keep ordering online. The 5, available in 22 more countries this Friday.

Lisa Brady, FOX News Radio.