The way realm population display currently works once the servers are live is that High, Medium, and Low are determined dynamically, in terms relative to the most crowded realms. So a realm with pretty rough queues (say 4k-5k) might end up showing as Medium because you aren’t Faerlina, Herod, etc.
This is how it’s worked for a long time, but the unprecedented size of the queues on the handful of outlier realms is skewing the algorithm. The team’s first priority is stability and getting new servers online as needed, but beyond that, we’ll look into changing this logic to be more intuitive (i.e. showing “Full” when a server has a queue, for starters). I know, this is technically not #nochanges, but then again neither are 20k people waiting to log into the same realm…