Interestingly, the growth over the last 6 months has been fairly consistent.
Check out the 'max' option, and from the start of the big jump in January, its been quite consistent.
I think things on the site have remained pretty good through the growth, but then again, maybe it is the constant evolving change. I'm curious how different the entries are from last year.
I think there is less a risk of the quality of HN degrading due to the fact that most people don't submit.
It would be interesting to see the stats on what % of users submit, what % leave comments, what % vote, and compare that with overall visits.
I suspect most of the growth has come from readers only. What do you say PG? have you got those stats?