I believe the 12/12 is on wearable parts such as brake pads, clutches, etc. The 3/36 covers bumper to bumper minus these parts listed in the 12/12 and the 5/100 is for the Diesel itself.
Yes, it certainly does look like they've gone away from that. I wonder if they'd replace a clutch at 35k on one though? I know on my last mustang that they told me to piss off when I brought it in with a smoked clutch at 14k miles....
That could have been the fact that it was still on slicks and skinnies from the strip and the bottle was still in the trunk though!