I guess it is possible to talk to someone who works the "PC" line in the main plant. But it is my understanding that the Performance Center was a separate building where PC gunsmiths designed and machined their own designs based on forgings received from the main plant. The Handgunner article 4T5GUY references indicates the PC was a "square building several hundred yards behind the main plant". The article further indicates the PC was staffed by "the most skilled and gifted gunsmiths,machinists, engineers,polishers,engravers,designers, and fitters who have ever worked at 2100 Roosevelt Avenue". Given offerings of the last several years, I do not believe an actual PC still exists. It is my understanding that the current "PC" is just another line in the main plant where some non-standard feature/s are added to regular guns, and of course a PC logo is added at some point. An individual in my chain of command years ago stated, "The perception is the reality". So I guess riding on the perception of quality in years past, marking the PC logo on a gun now days is all it takes....
I've owned several actual PC guns from the late '90s to early 2000s, the last about 2007 IIRC. They were beautifully machined, barre/slide/frame closely fitted and finished. I would compare overall build quality to the Swiss SIG P210 pistols. Not what I see from the "PC" pistols flooding the market now days............YMMV
BTW, Before the Handgunner article appeared, I'd already owned a 945 and Stainless and alloy framed CQBs. I was glad to learn more about them when the article appeared. I carried the alloy framed CQB for a few years full time in LE. Never a malfunction of any kind.