Sorry but I don't buy the concept that it's supposed to burn. The PVW 15yr didn't burn and it's 107 proof. My William Larue Weller 2010 didn't burn either; however it did create some warm heat. A heat that no other bourbon has matched since.
Most of the low end bourbons are all burn. That and Woodford Double Oaked. It's like a flash of flavor and then prepare for pain. My guess is, if you drink enough of it on a daily basis, your tongue and taste buds are so numb you couldn't tell if it was burning you or not.
I bet if you stop drinking for a month and started back, you'd feel the burn again.