I haven't followed this -- what's the demographic shift of Reddit about?
Aside of that, I think somebody on HN also pointed out that it is now easier to get downvotes here, because of an emerging trend to use downvote as an indicator of disagreeing with the OP or GP. Maybe the rise in upvotes is also part of the same "paradigm shift" (which I personally wouldn't like).
It would actually be great to have a HN user-level option that hides all vote/point counts, including the ones given to your own posts. Can probably be easily done with some browser addon, though, but a HN option would be nicer.
1. An increase is Ask HN posts that a short time ago wouldve only been on Stack Overflow
2. An increase in low quality meme comments that a short time ago wouldve only been on Reddit
That leads me to believe that HN is one of the last the safe harbours for tech minded folks as SO and Reddit continue to decline in quality.
If HN wants to show some data on comment quality overtime that refutes it I'd been keen to eat my words.
Not writing this to attack you so please don't take it personal. Just sharing my thoughts.