The range of lever travel on rim brakes does vary from Mfg to Mfg, but they are noticeably longer than on my HRD brakes. And, they offer less clamping force. So the force/mm of travel is much higher on my hydraulic disc brakes and that makes modulation more sensitive at least to my hands. The point isn't the delay until the pad hits the rim or rotor, rather, it is the smaller amount of lever pull needed to generate more force than with a rim brake. Thus, feathering the brakes for a corner is trickier. I do have peripheral neuropathy in my hands, so, I could be more sensitive to this difference in brake behavior. I do have to move the lever one click inwards and will play around also with the lower biter screw. I have been preoccupied for 2 months trying to get them to stop squealing and think I finally resolved it.

I think there was a mechanic in this thread making a similar comment.