No I think that’s just something he suggests when people encounter difficulties with their stroke technique.
It’s just a simple trick to get a good reference point for depth and a decent flat transition across the plain of the strings.
One mantra he often repeats is “The lighter the touch, the sweeter the sound”, it certainly works for speed until you get very comfortable and can begin to draw more volume without digging in.
The book focuses on exercises to develop different strengths to ensure a continued development regime in a broad range of skill areas.
Here’s a pic of the contents page;
Bookmarks