No, I think that the downside of creating an echo chamber / filter bubble is far greater than the benefit of nudging a post up a bit. Posts from people I follow are already clearly marked with the colors. A thread as big as the who are you isn't going to be much more readable with different sorting, I think. I've been thinking about comments, and a bigger problem I have right now is about returning to posts I've already read. When I read a post and it has 5 comments, it might create a good discussion after I've been there. But there is no way for me to tell if I'm missing new comments on a post I already read, unless I remember how many comments it had. I've read the above post at least five times because the number just kept on growing, but it's the exception. Maybe a number next to the comments indicating new comments, or giving the comment logo a soft color?