[Peroni]

1) True

2) False

3) True

All of the above require context and/or elaboration.

1. The HN voting ring detection process is exceptionally clever. Bottom line: If the same few users, IP's, etc are constantly upvoting your posts, it will trigger and your future posts will bomb.

2. I've often shared my posts on Twitter (as do most people) and I've never, ever seen it have a negative impact.

3. Upvotes are weighted. If you're a relatively new user, your upvote has little impact on someones post.

[ColinWright]

    3. Upvotes are weighted. If you're a
       relatively new user, your upvote
       has little impact on someones post.

Do you have a reference or some evidence for that? I'm not disputing it, but I have no evidence either way and I'm interested to know how you can be so sure.

Thanks.

[Peroni]

Purely anecdotal I'm afraid but considering how pg likes to keep the algorithms relatively secret, it's probably as good as you'll get.

Anyway, a good friend (and a relatively new member of HN) upvoted a post (not my post) and after refreshing the page we noticed nothing had changed. I upvoted the same post and my upvote was instantly registered. Seen that happen a few times now with different users.

[deepak-kumar]

Yes. It happened with a friend of mine few weeks back and that's what made me ask this here.