Ed T do you mean grilled Hamburger. After 13 years in the southern US I am having trouble imagining even what BBQed burgers would be.

Nope, not sure what you call it in your local,- but, grilled to me is cooking on an indoor electric grill (aka George Foremen). A completely different result.

In my local, BBQ ing burgers are cooking them on a BBQ, gas or charcoal.