The days of the success of the original iPad that was sold in 300,000 units devices are history by now; the iPad 2 has outrun its next of kin by 67 percent in sales, just days after its retail availability. Frantic buyers spend a few days wandering the stores to buy themselves a device, but some retailers have already run out of stock.

“Our checks pointed to a shocking 100% stock-out rate across Apple/authorized retail stores just a few hours into the official launch Friday evening, contributing to what we believe was one of the company’s most successful product launches to date,” wrote Chris Whitmore of Deutsche Bank in a report to clients on Monday.

A good indicator of how busy Apple is with selling the iPad2 is their order section of their website; last week it took them one week to deliver the product, whereas this week the waiting time goes about three or four weeks.

A small survey undertaken by Piper Jaffray shows that buyers of the iPad 2 tend to be new to tablet devices and draws us a bit closer to the next question. Why did new clients opt for Apple’s iPad instead of going for competitors’ devices such as Motorola’s Xoom or HP’s TouchPad for example? Or why don’t tablet owners of the original iPad upgrade to iPad 2 as iPhone owners do? An important role is played by retailers as well as iPad2 is sold by AT&T, Best Buy, Verizon and Wal-Mart , unlike the original iPad that was sold by Apple alone.

It’s not only the revenues from the unexpected sales of the iPad 2 device that make Apple content with what has come out of months of hard work of the whole Apple team, from the technical team, to the marketing department. Following the huge success in sales of the new device, the Apple Inc. shares got a fractional rise of 1 percent yesterday morning on the stock market. The trading price was $352.75 per share.