It was implied that if the connection is sweated instead of threaded you will not get a leak. In that implication in whereas, "some of us still know..." that people who don't know how to sweat a pipe use the threaded version (not the case, but I was illustrating the inaccuracy by making the threaded gas pipe comment) - If a thread connection isn't good enough for water, well then, it certainly isn't good enough for gas. (Not accurate since we all know that gas is most often run in black *threaded* pipe).