I prefer recency bias. My instinct is that a higher percentage of people voting shortly after the show actually heard the whole show - either attended, streamed, LivePhish, or other.

Somebody that listens to, say, a couple songs from MPP Tweezerfest and thinks, "Meh, doesn't have a 28+ minute jam and don't care much for Waiting All Night" or someone who looks at Charlotte 2019 setlist and song lengths and thinks "sucks they close first sets now with new songs" - to me - is less informed and useful than someone who attended.