We camp-host two months every summer, not consecutive months (May and August), sp we set up to be there for a while. We have an O-grill from LL Bean that we purchased in Maine about 5 years ago and we LOVE it, but we also have a CampChef stove with an oven. Everything we make can be made outside, under our awning on these two propane fired cooking units. The CampChef has two eyes, one is very high BTU and the other is for simmering. The oven bakes wonderful biscuits.
Yes, the higher the BTU rating, the quicker you can boil water and cook other things. On some of these stoves, you cannot get water to boil in an hour. (Friends had one and we finally took it off their burner, put it on ours and had it boiling in about 5 minutes.