Yes it is.
The one thing that must be remembered though is the article applies to military spec 1911. A few of my guns have hex head srews holding the grips. That takes a tool not on the guns. A few more have bumper pads on the mags. They will not work on the barrel bushing. Pretty much all the rest will go as described in the article.
The US Army gave me a 1911 and taught me to fire it effectively. Then they taught me to field strip it in total darkness by feel. After I got that mastered, they taught me to reassemble it by feel in total darkness. What they did not teach me was how the parts work to totally strip the gun without tools.