So neither matters?
Pinging is the sound of awesome mechanical switches resonating through materials. Some never notice, drives others crazy. I'd make fun of them more, but then again, very similar things can be said for crappy keyboards, and we are all here for a reason.
I don't know the answer to your polling rate question, but wonder if the fact that Cherry switches need not be bottomed out to register would allow a Filco to surpass a keyboard with an inferior polling rate.
Keyboards [that anyone here gives a damn about] that actually do have low polling rates are well documented, and even they only exhibit problems at >100wpm typing rates.
(Is the controller poll different than the USB poll, the one that would cause delay in a game?)