Yes so at 1 min you only get 20% of the full rewards you should receive from curating, at 4 mins 80% and 5 mins your full 100%. Now there are cases where you may want to vote at 4 mins if you anticipate alot of people will vote at 5 mins, you want to frontrun because whoever votes first gets most benefit, so better to get 80% of more than 100% of less if that makes sense.