Got this from one of the forums:

The 1MW claim certainly comes from the fact that they're using pulse compression techniques common in pulsed power PFN designs to compress the same amount of energy in a smaller time frame. In gas discharge lasers, a fast electrical discharge results in a stable plasma, and desirable laser performance. What really got my attention in the article were the picutures of the comustion wave front propagation from a traditional plug verses the pulse plug. The wave front propagation was shown nearly 2x faster w/ the pulse plug. Chemical reactions occur on the nanosecond scale, so if the pulse discharge is able to deliver ALL the spark energy to initiate combustion, rather than taking longer to spark, and burning the pulse energy in the plug resistor, this would establish a higher energy shock wave and potentially enhance the rate at which combustion occurs... I say it's plausible to attain a more efficient (and more consistent) combustion cycle.