Interesting.
The two PPK/S (both used) I handled (one was a S&W) did have fairly heavy DA trigger pulls, but no heavier really than a brand-new J-frame, which I believe come stock at about 15 lbs.(?). The SA pulls were pretty good I thought, maybe 5-6 lbs. or less.
I'm curious about the heavy slide racking thing, as I've heard this a couple times before, but again the two that I handled were actually easier to rack than my Shield. Not a whole lot easier, but noticeably so anyway.
As for slide bite (another PPK issue I've heard a number of times), as I haven't fired one yet, that remains to be seen. Oh, I'm not doubting you or any of the other posters that mentioned this issue, but usually getting bit has more to do with how the individual grips the gun than the gun itself, IME.
I've owned a few guns that bit me over the years, the two worst offenders being a 1st gen Glock 19 and a Ruger LCP. In both cases it was due mostly to how high I gripped the gun in question.
The LCP was the worst offender, biting me about every third round or so. I'd leave the range with most of my hand covered in drying blood. Finally figured out that I needed to make the grip wider, especially right next to the base of my thumb. A bit of tennis grip tape and a Hogue Hand-all Jr. moved my thumb just enough so that the slide no longer bit me.
At any rate, thanks for the info; I'm more convinced than ever that I really need to test-drive one before I buy one.