One of the first questions in the survey was "have you played D&D in the last three months". If you said no, you were shunted to the end of the survey and given a thank you notice.
I'll wager that a lot of potential support for the 3d gaming table was silenced by that.
I could be wrong, but I recall the question differently.
It asked something like "Do you currently played or have you played 4e D&D in the past?"
And the possible answers were something like:
"1. I currently play 4e D&D."
"2. I don't right now, but I have played 4e D&D in the past 3 months"
"3. I don't right now, but I have played 4e D&D in the past 6 months"
"3. I don't right now, but I have played 4e D&D in the past year"
"4. I don't right now, and I haven't played 4e D&D in the past year"
"5. I haven't ever played 4e D&D"
But I could totally be remembering wrong. Does someone have a copy of the survey they took?
It would be interesting to see the survey questions again.