I have noticed more wheat being cut with stripper headers also. One big advantage to them is you don't run as much through the combines as they just take off the heads and not the straw. They are also better for picking up down wheat. Here in eastern Kansas where most of the wheat is double cropped backed to notill beans, they leave less residue on the ground so the beans plant better. The down side to them is they are more expensive to keep up.
They are definitely better for the pheasants, and I hope their use keeps expanding. Here is a youtube video of a stripper header in action for those that are curious.
http://www.youtube.com/watch?v=2EYij93pCZQ
if all the wheat looked as pathetic as it does in this promo, it wouldn't make a damn whether it was stripped or not...as far a stubble is concerned.