Jerry by default is real, his GM'ing has been a fantasy. Let's take a brief look at his decisions, these are not all of them, just off the top of my head.
Hiring Campo
Hiring Gailey
Hiring Garrett
Hiring Moore
Acquiring Drew Henson and that other baseball QB.
Drafting Quincy Carter, the poor mans' McNabb.
Using an undrafted QB to run America's team.
I could go on, but...
Actually, all those things were real too. Some I had a problem with at the time, some not so much.
Campo and Carter were the dumbest decisions. Those should have had failure written all over them.
Gailey had a strong coaching background, so his hire wasn't a blatant mistake at the time. It's only hindsight that tells us that.
I also wouldn't have had a problem with Henson or Hutchinson
IF they had been treated only as projects behind a more serious prospect, but the Cowboys didn't get that more serious prospect and therefore were forced to count on them
Using an undrafted QB wasn't really a bad thing. Romo wasn't elite like Peyton, Brees and Brady, but he was clearly next level. Lesser QBs have succeeded.
As for Garrett, I didn't have a problem with Jerry hiring him, but he elevated him too fast. Jerry sometimes gets a grand notion that he can foresee things others can't, and in his zeal to prove it he jumps the gun. He did that with Garrett and with Quincy Carter.
As for Moore, the lack of experience is a concern, but I'm not going to condemn a man who hasn't yet had a chance to prove himself.