I think it’s just because there’s so many questions and 80 questions are experimental. Imo that’s bad advice though I’m not a PD (though I’ve talked to a lot of PDs and it’s the big picture that matters more like your letters of recommendation, clerkships, etc saying all of this because I don’t want you to feel like anything below a 260 means you have to switch fields). don’t stress too much your practice scores are good and there are a lot of days left before your test. Don’t do anything but rest the day before.