While shooting several .380 and even .32 blowback, fixed barrel pistols, I (or the web of my hand) have on occasion noted, "that was slightly uncomfortable". I don't think the PCR ever elicited that thought. Those pistols include the SIG 230 SL, Walther PPK, vz. 50 & 70, CZ 83 (.380/.32). Have also shot the single stack version (Beretta 85FS) of the 84F but not enough to consider it as having any more bite to it. It is also a slightly different design with a removable barrel.
So, there's something to what the store manager and others claim whether it's due to the blowback or frame design. I enjoy the heck out of the CZ 83 and don't let what I consider a minor occurrence (to me) from shooting it often.