Perhaps it's unfair to compare a new gesture-based controller for Microsoft's Xbox 360 to Apple's iPad tablet, but both are competing for consumer dollars in the electronics market. With that in mind, ReadWriteWeb's Marshall Kirkpatrick points out that it took Microsoft just 25 days to sell 2.5 million controllers while Apple needed 60 days to sell two million devices.

There are certainly a lot of caveats to these numbers -- Black Friday sales, the difference in retail price, etc -- but it's safe to say is that the Kinect already looks like a success. Microsoft expects to sell 5 million units by the end of the year.

The iPad was crowned the fastest-adopted consumer electronic device ever last month, stealing the title from the once-coveted DVD player. Records are made to be broken, though, and the Microsoft Kinect has already come out of the gate twice as fast. Notably, Microsoft predicted back in September that it would sell more Kinects than Apple is selling iPads.

25 days after its launch, Microsoft said today that it has sold 2.5 million motion-detecting Kinect devices. Granted, that includes sales over the Black Friday shopping holiday, but reviews of the device have been positive. Apple took twice as long to sell its 2 millionth iPad. These seem to be the days of the radically new interface.

Read the full story at ReadWriteWeb.