yewlStickies that hit the ground before detting have full, instant, pre-nerf damage radius. With a scout +forwarding you your stickies are going to be ground stickies, not air dets. The nerf primarily weakened the ability to do mid range and long range damage.
This is incorrect. Stickies on the ground will now have full radius yes, but that radius will be the same as rocket radius. Pre nerf radius was something like 20 percent larger than rocket radius.