Another consideration is value of the tone pot itself. The taper of the rolloff is affected slightly between values as well as the knee frequency. For single coils, I typically use .022 for the bridge, sometimes .033 but never larger. Almost always the pots will be the standard 250K.
BUT, with humbuckers, using a 250K tone pot instead of a 500K or 1MEG, the taper will be more gradual, which I prefer, and the knee frequency shifts slightly. Depending on the humbucker, I'll mix and match the tone pot value with the tone cap value to get the amount of treble cut and taper that suits me. As a variable, the inductance does seem to be a significant contributor, IME. I have a Strat with the TV Jones Classic/Classic Plus and that guitar has a 500K volume pot and a 250 tone pots with a .022 tone cap for the bridge and a .015 for the neck. To me, the filter and taper are perfect.