There are still a lot of high rank players there from every section that participated. Eastern and Texas are probably at a disadvantage just because they both field 4 teams.
Of note - the official said they were on the court more at this zonals than and other. Mostly because of a few Eastern players who didn't seem to know that balls on or near a line inside of the courts were still good balls.
Probably the team that surprised us the most was the Pacific Northwest. Horrible doubles but all but 2 single matches were tight.