Also, muscle mass will only begin to develop 1-2 months after intervention of the program. All strength gains up to that point are gains in neural recruitment of muscle fibers.

For most martial artists in a combat sense my interpretation is you will want to work for muscle mass since it is better with quick and explosive movements. It is essentially better during anaerobic activity (less than 2 minutes of continuous use). But endurance trained muscles are better in aerobic activity (over 2 minutes of continuous use).

To improve your speed all you need to do is practice the technique to improve the neural pathway, and learn to relax the antagonist muscles involved.

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"You must eat bitter before you can taste sweet"- Iron & Silk
"I see no virtue where I smell no sweat"
"Arm yourself because no one else here will save you" - Chris Cornell