I would agree with that as well.... The focus lacks the "jitters" some of the MKIII's I tried displayed.
Perhaps it is just new ownership bias, but it seems the 85 f1.2 is faster to focus using the MKIV than the my MKIIn.
I wouldn't call it bias. It's actually a very good observation. The 85 1.2L EF II focuses faster on the 4 than it does with the 3, at least on acquisition and lock. I also use this lens for fast moving gymnastics at times, even though many say it's too "slow focusing" of a lens.






