I find, however, that reading subcomments thoroughly is the one and only way to know which are gems and which are just popular cheap shots. There is no royal road to learning mathematics,
http://en.wikipedia.org/wiki/Royal_Road#A_Metaphorical_.E2.8...
and there is no way to get good information out of written material except by reading it carefully.
After edit: for readers who haven't seen all this before, here is historical background on why Hacker News changed the interface to not showing publicly the karma score of each comment about half a year ago. The site founder, pg, asked for suggestions on how to "stave off decline of HN" in a thread he opened 197 days ago.
http://news.ycombinator.com/item?id=2403696
He then announced and experiment of not showing comment karma scores 189 days ago,
http://news.ycombinator.com/item?id=2434333
noting that he might change settings back and forth as the experiment continued. 186 days ago he opened a simple yes/no poll about the experiment
http://news.ycombinator.com/item?id=2445039
and 180 days ago he replied to a question with a preliminary report on how voting behavior has changed,
http://news.ycombinator.com/item?id=2465271
and now today he has said that he is satisfied with the results of the experiment. He runs the site, and I defer to his judgment about how to run the site, but I must say that I agree that the site has improved since visible comment karma scores were turned off. I can still see MY OWN comment karma scores, and so there is still a reason for readers to vote--to guide the behavior of other people posting comments so that the site guidelines
http://ycombinator.com/newsguidelines.html
are fulfilled in letter and in spirit and this is a thoughtful, civil community.