Some of that kind of data (account age, karma-per-day, newer vs. older users in the top-100, etc.) can be found by digging around here: http://hn-karma-tracker.herokuapp.com/

That's the site I used to grab the top-100 list, because the 'leaders' list on HN itself is wonky: https://github.com/HackerNews/HN/issues/49