I'd wait a few years on Chicago -- my impression is that they've been undergoing some pretty profound cultural shifts regarding admissions and grading, i.e. their rigor is getting more performative and less real (and it was always at least a little performative, or at least, rooted in being just a little gratuitously mean).
EDIT: Not coincidentally, it was an admin brought in from Yale who got this ball rolling.
EDIT: Not coincidentally, it was an admin brought in from Yale who got this ball rolling.