The Xbox Kinect motion sensor is Microsoft's answer to the Wii and Sony's Move controller, and since its launch back in Nov. 2010, the device has been doing well at retail. Now, per reports, it appears that Xbox Kinect sales are slowing down.

According to Mat Barlow, general manager of product and marketing at Microsoft, the company has managed to ship 20 million Xbox Kinect units since November 2010. Barlow revealed the same in an interview with Gamesindustry.biz.

"We're at 20 million now, and again, that number's just continuing to grow. And I know we've seen holiday cycles like this. Gift givers coming out to buy Kinect is really going to be a large chunk of the console units sold these days. So 20 million units of Kinect and at the end of this holiday that number should be creeping up as well," said Barlow.

This number is quite surprising and not that spectacular when one takes into consideration that 18 million Xbox Kinect units were shipped as of Jan. 2012. Therefore, Microsoft has only managed to ship 2 million units of the device since then.

It is not certain if mistakes were made in the numbers, or if Mat Barlow is not fully up to speed with what is going on in his own division. However, if these numbers hold any merit, it is safe to say Xbox Kinect is not doing so well.

Xbox Kinect sold over 750,000 units on Black Friday in 2011, some truly impressive numbers. Come this holiday season, Microsoft would surely want to mimic those sales figures, which could very well happen with recent Xbox 360 holiday bundles and the new $99 Xbox 360 system with a two-year contract.