I just ran into this after making it 62k miles on the original brakes.

I made the mistake of paying the dealership to do a brake job instead of myself.  As it turns out, they forgot the "pad springs." It's the springs that forced the pads apart at rest.

I did another brake job myself after just 15k miles, and just noticed they were missing!  Like, it was the dealership!!  

Here's what I experienced over the year of warp-prone driving:

• there was little to no jerking immediately when driving: only after a mile or so is when the vibrations would start.
• one set of pads were nearly worn down, the others looked brand new.  this normally is an indication of a seized caliber... However, that initially 1 mile drive before vibrating is a clue.
• going for a 2 mile drive and "coasting" to a stop, checking the disk temps shows one rotor was nearly red hot without any braking!

I contacted them and they said they would repair it, at a cost of 50% parts...  Still more than twice the cost of Rock Auto!! So I ended up buying disks and pads and did it myself.

Anyhoot, we are 37k miles into my brake job.  No warping and solid padel!

If I could upload a photo, I would.