Well contrary to some pretentious "one way to do things" model...I am only going to say that yes, sometimes the S&R model you see discussed and shown here is too slow and telegraphing.
Stand there with a spear in your hand and do not move your arms or shoulders and make the spear shake up and down and spiral in and out with only your body. Instantaneously transitioning, non-stop.
There is more than one way to do certain things. For certain purposes, one is better than the other.
Well, gee, that's odd. I watched Chen Xiaowang release 9 times in about one second, yet his beginning training had these sorta slow-but-correct store-and-releases. Think maybe it's a progression? In terms of speed of handling anything, I think you're probably misunderstanding the training as the end-product. But then again, what you're saying is much like the people who watch a Taiji form and say "it's too slow to ever be effective" and they make jokes about it, displaying their own ignorance more than anything else.