iPhone 5 pre-orders take Apple by surprise

Within hours after going on sale, the initial shipment of the new iPhones sold out.

Shipping estimates slipped to as far as 4-5 weeks.

According to The Loop, Apple was taken aback by the huge number of customers pre-ordering the device.

“Pre-orders for iPhone 5 have been incredible,” Apple spokeswoman Natalie Kerris told the site. “We’ve been completely blown away by the customer response.”

The iPhone 5 will launch in stores on September 21.