Not sure if there is a specific, objective answer to this question but I get the same everything I want to buy a piece of hardware and try to check if it's Ubuntu / Linux compatible:
Required OS → Microsoft Windows 7 (32/64 bits), Microsoft Windows Vista (32/64 bits), Microsoft Windows XP (only 32 bits), Mac OS X 10.6.2 or higher, 10.5.6 or higher, 10.4.11 or higher
Thing is, the product usually does work flawlessly with Ubuntu. Why don't these people even mention that in the product specifications? Why do they always make it harder for the (admittedly small) Linux-using part of the population who want to buy their products?
It's not like including that information somewhere would cost them money, would it?