Possibly Retreading Old Waters?

[freefrog]

That's showing the resulting resonant peaks, but it's not showing the actual resistance the pickup 'sees'.

I'll have to open a guitar and measure the tone pot to check.

The amplitude and Q factors or these resonant peaks are directly due to the resistance of pots as it's seen by the pickup. So I consider they show it, on the contrary.

I've already shared many times here theoretical links like the one below (see fig 14 when it comes to ohmic loads):

http://buildyourguitar.com/resources/lemme/

Also, you might fail to measure the resistance of a tone pot to ground with a mainstream multimeter: tone capacitors use to block such attempts. Reason why the best way to measure the overall resistive load remains... to check its effect on resonant peaks, as done above.