Yes, but the greater weight they get need not apply indiscriminately to all users of HN.
The simple act of voting on a comment implicitly indicates which other users a given user trusts and thinks should have greater weight. Namely, they are the other users who voted the same way on that comment.
A system could be developed which takes advantage of that information to give each user a personalized view of HN comments and articles.
I describe a scheme to do just that elsewhere in this thread: