This is not correct. See the following FAQ

https://steemit.com/steemit/@shenanigator/official-steemit-faq-rough-draft-your-edits-are-needed

If a post is upvoted the moment it's posted, 100% goes to the author
If a post is upvoted 30 min after posting, 100% of the curation award goes to the curator.
Between 0 and 30 minutes, each moment that passes, more of the reward goes to the curator.
At 15 minutes it's a 50/50 split.
At 23 minutes, 90% goes to the author and 10% to the curator
At 27 minutes, 10% goes to the author and 90% to the curator

Your best strategy is to vote at or after 30 minutes, but before a whale.