Not quite correct, Checkboard.
With (as the qwuestion poses) three reds and one white you'll be coming in at less than 3 degrees (if that's what they're set for).
You can't make an assumption about your rate of descent. The angle at which you're coming in is related to your groundspeed. If you maintain 3 degree glide, a higher groundspeed equals a higher rate of descent. Maintain less than three degrees with the same groundspeed and your rate of descent is lower.
And finally, since there is a spatial difference between the pilot's eye and the undercarriage, if you maintain less than three degrees, the pilot's head is lower, therefore the gear is lower, therefore you WILL touch down shorter.