Ask HN: More Bots on HN Lately?

I've noticed instant voting on comments submitted lately. As in click submit on comment, immediately go to profile and check the score on it. Appears to be damn near instant (<2sec even on long comments) so its not a human. Mostly up, sometimes down.

Voting bots are nothing new of course, but I don't recall seeing visible bot action on hn before that I could see with my own eyes. Plus the both up & down suggest some sort of logic driving it - even if crude.

Anybody else notice this?