I'm sure 4-6 were in no particular order...
I'm sure fans did celebrate because they thought they were going to greener pastures with the rest of the core of the conference shedding the likes of Kansas, KSU, ISU...since they have realized they are stuck with UoU which can't be satisfying for them...
I've never really seen the evidence you perceive about them being glad to be away from Texas. Especially since you agree that they felt they would be joined by Texas when they initially made their move.