Wow, Feif- talk about misunderstanding.
I wasn’t saying that the difference between those who learn Daf Yomi and those who learn in Yeshiva is aptitude. Not at all.
I was saying that the difference between one who learns Daf Yomi and remembers nothing vs your uncle (and those like him) who develop tremendous bekiyyus in Shas is aptitude. Similarly, the difference between yeshiva boys who spend months on a single amud gemara and remember nothing vs those who become bekiyyim in a sugya is also aptitude.
IOW, the difference in knowledge after time has elapsed is in who has done the learning, not how quickly the pages turned.