Ah, this reminds me of another technique that annoys me: complaining about the number of words used in a comment. I think your complaint about verbosity can be legitimate when a person uses more words than necessary, but sometimes someone will complain about a post because of its length, regardless of whether its length was justified. I've seen two varieties of this technique: in the first, the post is substantially dismissed (e.g., "You use a lot of words to say nothing/little"); in the second, the complaint expresses exasperation (e.g., "Ugh, now I have to get on my computer to respond to your lengthy post!"). Both are intended to belittle the person whose comment is being targeted, rather than raise any substantive points.