Imaro said:No, I'm not looking at it from a "3.5 perspective"...I'm looking at it from a logical perspective. Even if a PC has a 10% greater chance (2 points higher than another) it still makes more sense to let him try to amass 4 successes at 70% than for me to try and get one or two at 60%...it's plain probability. He has a better chance of not amassing a failure than I do. That has nothing to do with 3.x, it's about math.
As to your second point...those skills won't necessarily apply to the situation so it is still possible a PC doesn't have a way to deal with the situation through his "good" skills. And it still does nothing to solve the question of why the highest ranked in appropriate skills shouldn't make all the rolls so that failure is minimized.
The last paragraph is (if true) a very heavy handed way of slapping a band-aid on the whole "spotlight on one character" problem they were trying to fix.
In Escape from Sembia, a skill challenge was shifting a very heavy bookcase in front of a door. The two strongest characters got to be "in the spotlight", with two other characters providing an assist. Kathra easily made her skill check, but Riardon failed his. Riardon's assistant failed theirs, providing no bonus, though Kathra's succeeded. One success, one failure. The bookcase only partially obstructed the door, buying the PC's 1 round of time. However, it took a round for them to accomplish this. The net gain? A wash.
Skill Challenges can be dialogue based, trap based, strength based, perception based... There's plenty of opportunities for everyone to be in the spotlight. I think you're mistaken in your belief that 4e attempts to remove possibility for characters to be in the spotlight. That would be bad game design. Players like it when their characters pull something impressive off.