Since lloyd is an OP and his experience doesn't count, so to speak, how about a pinball player who worked in a bowling alley for 8 years? We got almost all the NIB B/W (and Gott.) games back then, and I was usually around when they were being unboxed. The OP was always nice enough to let me play doubles with him when he was testing the games. Here is some of the brand new out of the box issues I remember:
TAF: bookshelf would not open fully, flakey rollover switch for for right inlane.
TZ: Didn't work out of the box. Not sure what the problem was (as I only played back then, could not afford to own a game), but I do remember board work.
IJ: POA would not tilt to the right
STTNG: After a lock, always popped 2 balls onto PF.
DW: Popper was mis-aligned, and game had great difficulty shooting ball into habitrail.
MM: Right troll quit registering hits after the 2nd game, the habitrail for the left ramp was not mounted properly, and balls would fall off at the joint where it attached to the plastic part of the ramp constantly.
JM: Hand Magnet started having issues the 2nd day.
RS: Red's mouth motor (or jaw gear) broke within the first week.
FWIW, the Gott. games had very few problems it seemed. I remember that rescue 911 had the stupid helicopter that hardly ever worked, and the rotating flipper in SF 2 would get stuck constantly. Beyond that, I don't remember too many issues.
So yes, from what I remembered, B/W games had their fair share of issues as well. Those games got the CRAP played out of them. The bowling alley made boatloads of cash from the games they had. I remember the owner saying that the profit from the games for the month paid most of the electrical bill for the alley (No clue if that was true or not)