E3 spark plugs....Gimick or?

Run them on my road course truck, and my 1940 440 big block truck. The 440 also has their coil and distributor. Know the owner quite well, and have seen the testing and the data. Proven better burn,and horsepower gains. They have a great video on engine masters about it check it out. Then ask Lea Pritchett she's not gonna put a gimmick in her race engines. Eventually people started using light bulbs even though a candle worked just fine if ya know what I mean.