TAG is for sure a Bais Yaakov, but I know girls who went there that were not so BY, one girl I know went because they had really good teachers, but she has an iphone and stuff like that, she also did not cover her legs all the time.
I have a close friend who went there for a year and then switched to SKA because even though the school is her family’s hashkafa, it was not exactly hers and she needed to be in a warmer environment, Baruch Hashem, she loves SKA, but I still consider her a bais yaakov girl.
If it was not for their rules about the internet and wearing color, i could see myself having gone there as a student last year.