Brian, Culver's started in the Land of Cheese, aka Wisconsin. While I don't doubt Larrry's comments about QC, that is one of the issues with any large scale or franchise operation, the home office has to ensure that the customer has the same experience in any outlet.
Personally, I don't recall ever having eaten at an In-n-Out. Around here, Culver's seems to be consistently one of the better choices for fast food when I'm on the run (Arby's & Culver's are at the top of that list.) If I'm travelling, I do try to find the hole in the wall joints.
5 Guys? Definitely not a fan. The burgers are okay, always a little more greasy than I care for. Their fries are consistently soggy & limp, and I like mine fairly crispy.
I'm gonna step out of this, go get a beer and make some popcorn.