I totally love that stuff, and gobble up '80s for it.
The "flying cumload" as the guy gets his cock out and either it's the first ejaculation that's "flies with the pullout" or a "little wad already built up" on the tip. Not a direct "creampie" mind you, although some semen/first ejaculation could have have occurred while in her -- or more often -- near-simultaneous with the pull-out.
And I totally agree, the "more uncontrolled, the better." No Peter North action where he pulled out and shot his first one within the very next 0.9s cycle (the 9/10th of a second natural ejaculation cycle). That's definitely ultra-pro style.
LOL... very technical analysis of it there, but I can't disagree with any of it. At one extreme is the "pro" who needs to stroke off for a minute before he can SQUEEZE his load out and drip it on her face, and at the other extreme is the guy who can time it right to the instant the cum is leaving the tip of his penis.
Like you said, not just pulling out right before cumming, but pounding her well after he's started cumming internally and letting the first pulse or two build up and then slipping it out just before the tidal wave hits.
Another pro is Jazz Duro, who knows how to unleash a huge load on her body without using his hands, and then follows up by stroking off a 2nd big load right on her face.