Interesting analysis ... but... (those damn buts :) ... as near as I know ... buildawhale, qurator, boomerang and pixresteemer are bots .. the first three are voting bots.
wise-old-man spams comments with random quotes.
I took from your post you're trying to analyze human commentors?
Thanks for your comment. I wasn't sure if they were bots as they were not active 24H but now qurator is. I shall have to start removing.