Are you doing 5 or 10 gallon batches with this burner? I'll call them and see if it is the same one on the Triple cooker.
I am brewing 10 gallon batches. The 6.5 gallon mash water usually reaches 170 about the same time the 13 gallon HLT reaches 150.
I'll be brewing another batch this Sunday, so I'll track the times it takes to heat the HLT and mash water, as well as how long it takes to boil after sparging. Since I am weighing and grinding the grain while the HLT and mash water is heating, I haven't paid much attention to the heating time (I get done with the grinding, about the same time the water has reached temp). Same issue with the boil, I usually am cleaning out the mash tun and finish just before the boils starts. After the brew session, I'll post the times.