The median ACT scores for Ivies is closer to 33 (they show the 25% and 75% score for each school). https://admission.stanford.edu/basics/selection/profile.html
For Stanford, 57% of their applicants have a 4.0 HS GPA and 72% had an ACT in the 30s.
BYU is a good school and I got a good education at a decent price. I went to two grad schools after BYU and never once felt behind my classmates in undergrad prep. Claiming that it's as good as an Ivy makes you look insecure in your education. As Lisa Simpson said, “Anything that’s the something of the something, isn’t really the anything of anything.”