What you're seeing is the early-crowd. With most (not all) posts, comments will eventually rise to the top that are more what you're looking for. IME it usually takes a couple hours. If it's a post where I really want to read the relevant comments, I'll usually come back at least 8 to 12 hours later and there's usually some good ones to choose from. Even topics like Apple that attract the extreme lovers and haters tend to trend this direction