Why are medium realms suddenly high?

[Bodiesan-earthshaker]

The Low/Medium/High/Full labels are based on peak population over the last 7 days.

Realm List Populations Updated -- 28 October

A few minutes ago, we enacted a change to how the populations are calculated in the WoW Classic realm list. Since shortly after the launch of WoW Classic, the realm list population labels have indicated real-time population levels. Now, the Low/Medium/High/Full labels are based on peak population over the last 7 days. We believe this provides a more-useful picture of a realm’s population to players who are making decisions about which realm to play on or transfer to. The realms which have not …