it depends on what are your objectives.
- If you just want profits and don't care about the author: vote after 30m
- You can share a % of the curation reward with the author and if the post goes "viral" even giving that % to the author may be profitable for both.
So, it all depends on what you want to do with your vote. I have and will vote for posts on the 1 minute, just to support the author taking the minimum and giving it to the author ;)
RE: The First "Bruno's Pick" goes to @saulius with SteemPayout.com for helping me understand how Steemit payouts really work!