Well, I was lucky enough to be the first one to come across this kid as he started to glissade from the false summit on his way back down. He was litterally 20 feet below the false summit when he messed up his ankle. Nice guy...he was out from GA visiting a friend and "wanted to test the snow hardness" before taking his crampons off. The snow set up nice and hard the night before and was quite solid from the lunch counter up to the false summit. I managed to gather together some climbers and we got the guy splinted and warm.
As for the helicopter, I think the origional plan was to take him up the 20' to the false summit so he wasn't sliding down with the bad ankle.
Five hours later we'd lowered him down to the lunch counter where we waited for them to make the call on getting him out of there. The funniest thing was how long it took for someone to make the decision on how to get him out of there. We didn't know if rangers were coming up or if he was getting lifted out for ever.
Lesson learned...take a rope on easy climbs because you may have to rescue someone. We were luck to run into the guy we did...he had splints, tape, rope, all sorts of things for a walk up. Everyone else who passed (as well as myself) had minimal gear.