I don't agree, your own voting power doesn't matter as a minnow, all that matters is to upvote something before some dolphins or a whale does so ... which means; vote as much as possible, but still selective of course, it still needs to be something good, otherwise it's not going to get any whale votes
it's basically gambling ... doing the math; only vote for good content, but the more the better
You are right. Spoting the trending articles before the crowd is essential.
5 weeks ago I didn't know about it. At time there were new users who upvoted everything, to receive curation rewards, they had about 20-30% voting power. I reflected to this behaviour.