Secondly, we could ask: Why in the world are so many more people (regardless whether they are S or N) constantly viewing the N forums rather than the S forums? I find it very hard to believe that a ton of S's are sitting there viewing the N threads (but not commenting a whole lot). On the other hand, I find it very likely and explainable that lots of N's are viewing the N forums because the content is more familiar to them.
Third, we could look at it like this: Of those 254 members that you refer to in your post, does anyone really believe that 50% or more of them are S's? Does anyone truly think that 127 or more of them are S's? If anyone does think that, it would be interesting to hear *why* they believe that. Taking it even further, it's commonly accepted that there are more S's than N's in the world. So, in order for S's to be representing themselves proportionately to society at large, even 50% representation wouldn't cut it. There would need to be 60% or 70% S's on the site, or whatever the true number is (it's well above 50%). So, of those 254, you'd need the vast majority of them to be S's.