It's not because we assume you did stuff wrong, it's because we're not warm and fuzzy that you don't. I mean, don't take that as a permanent criticism -- we realize you're still "cutting your teeth" when it comes to taking headphone measurements. When your measurements start reflecting our experiences, then we'll start putting stock in them. Maybe (some people will never). Of course, I remember seeing the measurements of a pair of ...what was it, the AKG K1000's? And they looked like crap.
You know, Headroom have their own faraday cage/sound isolation room. I'm not sure what type of measurement microphones they use, though. And you do realize "measurement microphones" are a special class of microphone, and that you can't just use any old microphone, right?