I think the OP's comments speak more to the current sad state of dealerships these days, not just Ford's. I had a Subaru Tribecca that I traded in for the Explorer that had a front door lock that would stick in the locked position occassionally. Not a good thing if you need to get out in a crash! Well, I finally figured out exactly how to reproduce it, yet it took over 3 appointments to get it fixed. Every time I'd bring it in they'd find something to replace - yet they never had anything in stock - and every time they'd fix it, I'd test it out and of course it wouldn't be fixed (even though I told them how to reproduce it).
I finally threatened them enough and they put their best mechanic on it and fixed it.
Then the gas gauge started acting goofy ------ another 4 trips.
Yeah its frustrating and it isn't right, but that just seems to be the way things work these days. In some respects you have a right to be upset and they should just perform the TSB. However, I see Ford's point - if they perform the TSB, replace the pads, and then you still have a squeak, they could lose a lot of money trying to fix a problem they dont even know for sure exists.
Some suggestions: 1.) Take a video of the problem. Seriously. I know Corey says that video doesn't substitute for a tech experiencing it, but at least it will give the techs more to think about and maybe validate your concerns with the dealership. 2.) Take it to a different dealership. and 3.) someone else here had a good idea - leave it overnight and have them test it in the morning.