Let me try...
Let's say gun X, the tight gun, has very tight tolerances. The frame holds the slide, the frame holds the slide stop, the slide stop holds the barrel, the slide holds the barrel, all in a consistent predictable spot, due to the tight tolerances. Gun Y, the loose gun, has a frame to slide that dance all over the place. How are you going to have a consistent barrel lock up with gun Y?
Yes, loose guns cycle faster, less friction resistance. No doubt in my mind. Tight guns absorb some of the recoil in their friction, making them seem sluggish. That is overly tight though. A properly fit gun will slide back and forth like it was on rails.
Again, we are talking slide to frame fit, not barrel fit. Most guns are hard to unlock because of barrel fit, not slide to frame fit. I venture to guess that your Dan Wesson has a tight barrel fit and a proper slide to frame fit. They probably did so to enhance accuracy. Most people are not IPSC shooters.