I learned my shooting techniques courtesy of Uncle Sugar, but in the same era. And with a 1911A1. We did some one-hand, bulls eye style (hand in the pocket) shooting, but mostly it was a two-hand hold. The instructors emphasized getting as close to the bore axis as possible with the grip - and no crossed thumbs!
I didn't really have much use for revolvers until about 20 years ago. I tried my semi-auto hold there (beautiful 6-inch stainless Python - still have it). Scorched the ever-loving bejesus out of my support hand fingers. In psychology we call that one-trial learning; I modified my grip with my index finger tucked well below the trigger guard. It still feels awkward to me with a lot of gun weight waving around way up high.
But still, cup-and-saucer? That's just so..., so, well Hollywood.