Sometimes those guys will tell you stuff to get you off the phone, but that actually sounds like a reasonable answer. I just sold a Silver C and while I tested the side burner and it fired right up, I never played with the flame control other than to light it and shut it off.....Duh, so I can't say how it functioned on low vs high. That being said, even on high, I wouldnt want to do more than keep a pot warm. If I had to boil a couple of gallons of water for sweet corn or something, I think it would be futile.