"Cola's method however, heats the elements to intensely high temperatures almost instantaneously, then immediately cools them."
He's working with limited quantities in a "home lab".
Steel-melting temperatures at home? Mythbusters specifically told him not to do that.
If he is using unorthodox equipment (he probably is) the energy savings will not scale up for mass production. A mass production facility would prefer to leave the heat on, which is probably a big hindrance to his instant cooling. And only a 7% gain? It doesn't sound all that impressive. Can he do this with cheaper starting materials? Will it work with useful large items, like steel coils?