Motorola has only sold 100,000 units of its rival to the iPad, the Xoom, since its launch in the US six weeks ago.

According to Business Insider, Deutsche Bank estimated the number of sales of the device after using the Android developer website to discover how many people are using Honeycomb, the tablet-optimised version of Google's Android operating system. The Motorola Xoom is the currently the only device that runs the OS.

The Motorola Xoom is the first tablet PC to run Honeycomb. The 10.1 tablet PC features an nVidia Tegra 2 dual core processor and can deliver up to 2GHz of power, since each core runs at 1GHz.

It was launched in the US on February 24, but has not yet hit UK shelves. It has been available for pre-order from retailers including PC World and Dixons for some time. However, no delivery date has been confirmed and the retailers expect the device to be made available some time this week.

Motorola has yet to confirm the figures are correct.

One website called Simply Electronics claimed to be offering the Android 3.0 tablet for £489.95 with an 'estimated' shipping time of two days, but further investigation by PC Advisor revealed it seems rather dubious whether customers will actually get hold of their Xoom any earlier than those who wait and buy them from other shops.

In comparison, in its first weekend on sale, Apple's iPad sold more than 300,000 units. Figures for Apple's latest device, the iPad 2, have not yet been released.

See also: Have the Motorola Xoom and Atrix flopped already?