Peat is a damn potent thing, and I'm sure it varies from maltster to maltster and over time.
When I was trying to dial this thing in, 3oz was barely there, 6 oz was way too much.
I don't even know what brand I had. It was just packaged up in a half pound package at my LHBS.
edit: I will add that this is the first time I have ever heard the recipe called "too peaty". Normally, people have the reaction that rico had. Meaning, they tasted a hint of peat and wanted more, or they thought it was just right.