I'm not sure I totally buy the concept that 'good' up/down-voting saves people time. I rarely come to hacker news thinking "I'll just check the top n posts, fil

I'm not sure I totally buy the concept that 'good' up/down-voting saves people time. I rarely come to hacker news thinking "I'll just check the top n posts, filtering out posts below a certain score threshold"; typically, I'm thinking "What are the posts I can spend X time reading instead of doing something else?".