Find your medium where you like it. There's no correct burn time. There's an average, and there's an expected time for most smokers, but that doesn't have to be you.
I've found that while a minute is a good way if you're a newer smoker (like myself to a point) to control the ammonia and prevent the cigar from getting too hot, it's really just a basic guideline. I have some smokes that burn slower that I can puff 35-45 seconds, and not really notice a difference. If it does get too hot, I can blow out into a torch and burn off some of the ammonia if I want to balance it out. It also depends on weather, how I'm feeling, and who I'm with. I have friends who can down a cigar that would take me two hours in an hour and twenty. That's what they like doing, and it's whatever.
If a minute isn't working for you, wait until the cherry is pretty much gone, and then puff. That might be closer to 45-50 seconds, which is still more than acceptable.
Honestly, the best way you can figure this out is if you take two or three of the same cigars and vary up how you smoke. Try puffing 35-40 seconds, and see what you liked or didn't like about it. Try one again at the minute, and see what happens. Pick a similar size cigar, and try that same time and see what happens. It's kinda fun in a way, but I wouldn't over think it.