No, the OEM bolts are 10.9 bolts.
What seems to be the case, is that the torque spec on the strut mount hardware is hyper-critical. A M8x1.25 grade 10.9 bolt has a torque rating of only 22-27 ft-lbs. That is why these are one-time use fasteners - they are designed to be torqued once and only once to 25 ft-lbs. If they are over-torqued, they stretch, which might induce clunking.
If anything, Ford should have gone with a bigger bolt. A M10 grade 10.9 bolt has a much higher torque rating at 45-53 ft-lbs.
Alas, I have no scientific proof just yet. I'll know more later today.
Joined the dark side.