Kindle sales benefitting from Sony Reader and Nook sellouts

Updated released a statement Monday saying that November was so far the "best sales month ever" for its portable electronic reader, Kindle. Does that mean that Amazon actually released sales numbers? Well, no.

Despite phrases in a press release like "flying off the shelves" and "#1 bestselling product," there were no numbers or quantitative data given. As John Paczkowski of the Wall Street Journal pointed out, Amazon CEO Jeff Bezos says he wants to keep "numbers close" to keep Amazon's competitive advantage.