I learned this while I was on my beer brewing kick in the late 90s. Ever try to boil 5-6 gal of something? It literally takes hours to heat that up. So I got me a propane burner, kind of like one of those turkey frier things, but bigger and better. It could boil 5 gal of beer wart in under 5 min. 180,000 btu, compared to average 38,000 btu ranges.
This is why you cannot do proper Asian food in woks on regular ranges either. You are better off buying a dedicated propane burners made for woks. They cost like $100-$200 and well worth it if you do a ton of Asian stir frys.
Thai Gas Burner with Stand, High BTU, Available at importFood.com