That's a good question, and probably not. I figure growth won't increase the proportion of quality comments, but it will undoubtedly increase the frequency. Hopefully the voting system will cause low quality comments to drift away from what we tend to see.

Something I take away from forums is that user volume is incredibly impactful, even if most is low quality. As long as there is something to scrape off the top, I think I'll be satisfied. Obviously this misses some nuance but I think it works as a rule of thumb, especially to grow incredibly small niche communities that otherwise won't exist.