While I’m kind of suspect to the source of this information, it seems like the launch of Windows Phone 7 was less than stellar. Sure, they give reasons as to why it could be so weak, but the source being unknown throws it off a bit for me. (Emphasis mine below).

Microsoft may have sold 40,000 Windows Phone 7 smartphones during the first day of sales, according to TheStreet.com. That number reportedly came from “a market research source who tracks phone sales.”