Disks in the wind? you can not even feel it.
I have ridden disks for most of the last year, and only once did I notice the wind, when I was resting my neck/back down a highway, sitting upright with no hands, and felt a brief wobble.
Yes front makes a big difference. Corima/Hed are both very prone to catching the wind. But if you are holding on, it will not knock you around....only a little when you relax your grip/cruising.

I was at an outdoor velodrome on Sunday, with a fair bit of wind, in the mountains of Kansai. I rode 2 bikes....mine had a normal low pro rear and front hed, and the other had a rear disk and corima 4 front.....didnt notice the wind much all day, just in my face! (and fingers!)...it was snowing!!