2da,
Despite the surveys, I would estimate with reasonable assurance that all the people that follow/monitor this board account for much more than 1.2ml shares.
I would guess more like 3-5ml.
I think your highest category was 200K+.
When you consider that truly large holders are reluctant to disclose, combined with the fact that many of those that checked 200K+ may hold much larger positions, and finally, that all the other Ariad boards appear to monitor us to some degree, I think our total readers are considerably greater than 1.2.
But, of course, it's only an estimate.