(I am somewhat positive Dale Carnegie included all of those points in his first book.)

Those are all very traditional points.
However, just because I consider many of the points "old school" and obsolete does not mean it is not a good article.

Back in the eighties, I was working for the Kinney Corporation (CA) - a company (as many other retailers) that took sales VERY seriously. So serious they developed an entire sales program, titled G.O.L.D. C.A.R.D (I can not remember what it is an acronym for), which also contained all of those points.
It helped me claw my way up, rather quickly (part-time to assistant manager in 6-months).

Here is what I now question & believe:
- do I really need to intimidate this female by firmly shaking her hand - will it impress her?
(I am not a "hand-shaker" and I believe this has been replaced with the changing of the cards.)
Nope!
If anything, I believe it will only intimidate and offend.
Why not French, in stead!

- will the fact that I do not shave every day, and often sport a "bed-head' hairstyle hinder business?
Nope!
Society, for the most part, is "hip", and many have now accepted the metro and uber sexuals, whom are sporting faux-hawks (and other messy salads), and a 5-o'clock shadow.
(I believe it to be a discriminating tactic.)

- is a fast paced person the sign of a "mover and shaker"?
(I typically walk fast - take long strides- and am constantly asked to "slow down" or "wait". No joke!)
Not at all!
I believe most persons, whom are always running around, do so because they have not properly planned their day.

I am actually offended by contacts that force me to hurry-up, &/or do not have any spare time for me --- their rushing around tells me that they do not.

Over the many years, different trends and life styles have developed, and if anything, I believe a person needs to gauge each and every situation, differently and respond accordingly.

If they are a traditionalists, yah sure, you may want to do use some of the tactics from the article.
But for all others, I suggest people adjust accordingly.