- The left hand needs slow practice to memorize the notes and the correct moves, which are the same at low speed and high speed (just done faster)
- The right hand needs fast practice because the correct high speed moves are different than low speed moves (like the difference between walking and running)
- If I can’t play something because of my left hand, then I have to practice the proper left hand moves at low speed and increase the speed slowly. Fast practice would be ineffective.
- If I can’t play something because of my right hand, then I have to practice the proper right hand moves at high speed. Slow practice would be ineffective.
- If I’m learning something new, I have to practice slowly until the notes and left hand moves are memorized, then switch to fast practice to get my right hand moves correct as well.
This is how I understand speed building on guitar and how I explain the huge differences between practice strategies that guitar players (and especially great guitar players) mention as being effective.
For example, I remember Troy said that slow practice and drilling is not what helped him to improve his guitar playing. This could maybe be explained by the fact that he had right hand problems, and not left hand problems (lack of finger independance for example) ?
On the opposide side of the spectrum, I’m nowhere as good as Troy but my right hand is much more skilled than my left hand. I had much more difficulties to move my pinky independently than doing 2WPS, and slow practice is actually what helps me to get better. I’m sure we can find better examples of great guitar players which promote slow practice as the sole key to speed.
All this could totally be 100% wrong but I’d love to know your opinion about it, and learn if it is the case !