That's not true. Decisions about who to interview depend on three equal votes-- mine, Robert's, and Trevor's-- and Robert and Trevor don't read HN enough to know who's who. At best, making thoughtful comments on HN will give you an edge in borderline cases.

The best thing you can do is what Scott said to do in the application: get to work. Then you'll sound in your application like you know what you're talking about, because you will.