Interesting thread. I have nothing technical to contribute but just some amusement.
I was told on two separate occasions by very large gentlemen - both well over six (one who hunted the moose and another an army vet) - who said that they fired a 45 and it damn near tore their arms off. Being an old FOG of 5'8 ish - I was surprised to see my arm still attached as I have fired 1000s. I do enjoy my 1911 as it enables me to practice malfunction drills more than my Glocks. Thanks to Tom Givens who taught to me to clear such. BTW, it's a SW 1911Sc and is finicky. Sigh.
I would protest the comment on fine cheese. I am an aficionado of such. In San Antonio/Austin area - one can go to Cabelas, then McBrides to look at guns and then proceed to the flagship Whole Foods, Central Market and Antonellis to buy the finest cheeses.
I note that the Swiss - a noted gun culture - also produce Extra Aged Appenzeller, Tete de Moine and Hock Ybrig - high end cheese for the expert. I intend to eat some of the latter for breakfast before tomorrow's IDPA match (shooting my G17, last match was the 1911).
On the issue of training - my research mind says that one would have to do a controlled study where a class of randomly assigned naive trainees go through the same protocols with the various calibers and guns to see if there are significant differences in outcomes - times, placement, splits, hits - whatever. Use reasonable quality ammo.
On the ND issue, Glock suffers from the trigger pull take down issue. Pulling the trigger on a gun is a trap for anyone (despite training), given the vagaries of human memory. You might think it won't happen to you. Think about it as you look for your car at WalMart or your keys at home.
The four rules - ingrained in the best. Yeah - I recall the horrified look at a nationally known trainer who asked about the draw stroke, proceeded to draw a loaded gun on a student. He was a touch shaken by the mistake.