Well at least we have an idea, that Sony has an idea of a number (400,000). With the Xbox addon the only idea that Microsoft has given is ( ???? ).
Ok, let's clear something else up really quick. If you really want to get technical, the marketing guy was responding to a question on Forbes. I haven't seen any media journalist ask a Microsoft marketing rep how many add-ons they shipped. Maybe if someone asks them, they might answer it.
Now until then gaming companies like Microsoft and Sony don't issue press releases declaring how many things they've shipped. They never have, they likely never will. In my 6 years running Next Level Gaming I never once got a press release from Microsoft, Sony, Nintendo, or Sega (when I ran Dreamcast HQ before that) telling us how many units they shipped out. When they are ready to announce their sales numbers, they will send out a press release. That's how it works.
And again I ask, why give a number out that you end up being wrong about? First it was 1 million at launch. Then it was 400,000 at launch. Now we don't even know if it was 200,000 at launch. That arguement of "at least we have an idea" is not valid here. The truth is we DON'T have an idea, and all we can do is speculate and try and figure out if Sony's numbers are right. So exactly how has this information even been useful?
If that's the case, Microsoft can easily come out and say they shipped 5 million add-on units and all you could do is speculate if they really did or not.