Doesn't it also matter who up-votes the post? I thought the ranking was a weighted points system. Meaning, if you have high karma, your up-vote is more respecte

Doesn't it also matter who up-votes the post? I thought the ranking was a weighted points system. Meaning, if you have high karma, your up-vote is more respected. I think I've even seen 1 or 2 up-votes getting a story to the homepage.