Seems they are talking about the alliance raid. There are weekly limits on normal and savage raids as well so "latest Raid" makes the post confusing.

The reason the queues are taking longer is because it's not Tuesday, the raid has been out for some months now, and we're in the tail-end of a patch lull (a time between major patches and raid tiers when the least amount of people are playing and this is reflected in the amount of people participating in content across the board). Added to this, you were in the queue on one of the two days with the least activity (Thursday and Friday), at a time that wasn't peak hours for the region you're playing in.