yes you have it right... it is after the vote from @newbieresteemday . So if you have it at 0 it is right when the @newbieresteemday votes... and 10 min would be a 10 minute lag.
You can tell that we don't have any whales by our total upvote... it is roughly 0.15 including @newbieresteemday... so I'm quite confident that no whales are trailing us yet ;)
But you do have the concept and right thinking... but in our case we are small so its not an issue!