Great article, thanks for posting a link to it.
I recently turned 55 years old.
Now I still consider myself "young", but since I do now qualify for a "senior citizens discount" for some things...I can pretend to be a senior and get my discount. *wink*
I was raised and still believe, and still "instruct": One should learn with a Revolver. I start[ed] out with a .22 rim-fire, and then transition[ed] to a center-fire, my preference being a .38 spl.
Learn the correct basic fundamentals with a revolver, and the .22 allows one to focus on these correct basic fundamentals. Simple: less felt recoil and the ammunition is more affordable. Oh, and fun! If one can have fun learning something, they will "get it" quicker" and it will be better ingrained.
When you have problems with the center-fire revolver, then break out the .22 revolver and "get back to basics".
No matter what one transitions to from a revolver (single action, double action semi-auto...) the correct basics from the revolver, will transition over.
Get into a "slump" with the semi-auto, one might consider breaking out the revolvers, either the center-fire, or .22 rimfire.
Steve