What jeebus is trying to say (and what I agree with) is that how you do on the boards has very little to do with how "smart" you are and much more to do with how meticulously you prepare.
People don't score well with the Taus method because they're smart. They score well because:
(1) The plan forces you to meticulously go through material multiple times
(2) The plan forces you to review all subjects, regardless of how much you like or dislike them
(3) The plan forces you to utilize outside review books to supplement the holes in FA
(4) The plan forces you to do a ton of questions
To do the "whole" Taus plan requires a concerted level of effort far and above the "typical" board prep experience. Most people don't read and annotate half a dozen review books into their FA. Most people don't do 5000+ questions.
That's why its successful. The principles behind the plan are solid, but its not a magic formula. It just gives you a framework to manage your time, gives you a sense of how much time you should spend on each subject, and gives you "tasks" along the way. Does the Taus method tend to self-select towards individuals who did well their first two years of med school? Sure, because the individuals that were very meticulous with their coarsework are going to tend to be the same way with board studying. And its a lot easier to raise your score when you learned everything well the first time and Step 1 prep is more focused on review than re-teaching yourself material. But there's no "pre-requisite intelligence" or "special trick" to it... its all about concerted effort, which is a lot easier said than done (even the best at it struggle with it).
What jeebus is trying to say is that it doesn't matter how you do it, but to do "that well" on Step 1 you need to make sure no stone is left unturned. You need to study everything, and study it meticulously enough that you understand it and can apply it abstractly. You need to do a ton of questions so you are comfortable with "how" the USMLE tests knowledge. There's many ways to get to that point. There's nothing special to taus, and its not for everyone, its just a decent format to structure your study schedule.