It takes much longer than 70 seconds to heat up a 12 inch stainless steel or carbon steel skillet on a home burner to a point where it can be used to fry an egg

It takes much longer than 70 seconds to heat up a 12 inch stainless steel or carbon steel skillet on a home burner to a point where it can be used to fry an egg or sear a chicken thigh, both of which are things a home cook may do with some frequency.