I initially upvoted this comment, rather than leave a redundant one... except comment karma isn't visible now, so it can't be used as a straw poll.
Since I made this comment, I guess I better answer the actual question: Mmmmmm-kinda.
We spent a lot of time on this issue when Lesswrong was starting out, and didn't come to any real conclusions. Visible comment karma induces some pretty big cognitive biases, and 1-dimensional karma definitely encourages groupthink, but hiding it is just so damn annoying. I've been having a hard time distinguishing the factors of my annoyance from the "boo hiss UI change", "oh geez a feature I used to use is gone", from what annoyance that might be there from an actual poor design decision.
I'm definitely for experimentation, and weakly positive about hiding comment karma; but it's odd that such minor UI changes can so badly annoy users.
Absolutely. In the longer threads I used to use comment karma as a way to decide if a long post/reply was worth reading or if it wasn't. If the rest of the thread was at 10+ and the long comment was at 2, then I knew I could just skip it.
I have to filter information, it is no longer possible with the wealth of information to read everything that is written and decide on its merit. The amount of news I take in daily, and process would overwhelm those who start their day with a newspaper and watch the news at 8 at night.
I hope that pg can reconsider, and add the karma back to the comments, it would definitely help me while reading HN.
I am surprised at how much I miss comment karma being visible. I scoffed at those who said they used it to gauge comments to consider versus skim past, but it turns out, it's exactly what I'd been doing. I guess I hadn't realized the amplification of the comment volume that has happened lately.
Yeah, I'm noticing it is harder with longer threads to get what the "group" finds important. For want of a better way to say it, it feels like I am more "alone" when reading the comments. I cannot see the wisdom of other people. Also, long response chains are really a pain because they "feel" harder to follow.