Yeah, I've heard some of the Break/Talkin' Cowboys guys mention this numerous times. Apparently Garrett has referenced it in his 'walkoffs' after press conferences when the recorders/mic is off, in training camp, etc. They have said that he has been pointing to SF as a model that he wants to emulate in that regard. They have heavily invested in high draft picks on the OL & have been one of the best teams in the NFC the past few years.
Maybe he hasn't always had an OL at the very top of his list at the draft every year, but it seems pretty obvious that he has pushed the idea of building the line through high draft picks, IMO. By all accounts Garrett has the respect of Jerry more than anyone since Jimmy, with Parcells being the exception.
I think it's a bit foolish to say that Garrett hasn't been influential in this, ahem, process. Jerry hadn't spent a first rounder on an OL pretty much ever & since Garrett has taken over it has been 3 in a row. That's not just coincidence. Sure, some of that is definitely circumstantial-obviously they coveted Shazier over Martin this year, for example-but what happened when Shazier was gone? Offensive lineman. Hard evidence or not, I have no doubt that Garrett has played a fairly sizable role in pushing to spend significant draft resources on the offensive line.