No, it isn't. Propane contains approximately 2,500 Btu per cubic foot. Methane has a heating value of about 1012 Btu per cubic foot.
Are/were you an east coast fuel oil dealer? That's one of the classic lines used to keep people converting from oil to gas. Fact is, the odds of you getting killed in a propane accident are less than being struck by a crashing airplane and almost a 1000 times less than in a car accident.
True. The US is a large geographic area and by percentage, most of the country doesn't have the option of street delivered NG.
True - But that's because bottle gas (propane, butane, etc) is more expensive (between 25%-50% by BTU) than NG.