You are welcome.
The time to vote optimally depends on the author of the post.
For upcoming authors, upvoting after 30 minutes is usually the optimal time. After an hour, other good curators with a lot of Steem Powers may have already voted.
For established successful authors, such as @sweetsssj, upvoting after 30 minutes may not be the optimal time, because the post may already have a lot of upvotes and already be on the trending page.
Thank you very much. Starting out here sure is confusing. I appreciate the quick reply.