I think the nsns comments are VERY important to new or underconfident togs. If it's a choice between these and no feedback, these are at least going to keep them snapping away.
What I DO have a problem with is the really good togs, who have been doing it for many years, been on these boards for many years etc who post extremely good images nearly every time getting "nsns" comments! And this, in my opinion, is what has led to TP being called 'clique'. People are more likely to click on a thread by one of the pros whose names they recognise, more likely to like the shots and more likely to comment.
But when they comment, they are usually judging the 'pro's shots by the same standard as all the others, which is not how it should be. If a newbie posts a shot of this level they need support, encouragement - basically lots of nsns posts with a few bits of crit thrown in to keep things real. But a 'pro' might take this level of shot every day and what he/she needs is to improve - with that standard of photography he should be able to take all the crit people throw at him so he needs his shots picked apart ruthlessly, but with plenty of compliments on how good they already are just to be nice
Also (not much more I promise), when a 'pro' posts a shot of a lot lower standard than usual it needs ruthless critique, not praise just because it's him/her posting it.
That's what I think, anywho