[rypper11]

Jerry Rice is 6-2 and played around 190lbs. John Taylor 6-1 185. They teamed to be one of the most explosive WCO offense ever.
Of modern players, Deion Branch (the Seahawks #1 wr currently) is 5-9 and Nate Burleson (#2) is listed at 6-0 but I think that's with cleats on.
Packers run a similar variation with Greg Jennings (5-11) and Donald Driver (6-0).
DeSean Jackson is 5-10 and he looked pretty awesome today for the Eagles.

Moss and ARE are 5-10. It's not a height issue for them it's a catch the ball even though you will get hit. That's why on 3rd and 8 they'll run a 7 yd cross expecting to catch in stride and run away. Where they are limited is inside the 10 yd line where the rules favor the wr (see Thursday's game when the cb was pushed down and flagged) and a tall strong wr should be unstoppable. But for the other 90 yards they should excel.

As for JC's accuracy, he's more than accurate enough. He just isn't confident enough to stick it in there. Can you imagine Favre, who most people say did pretty good in a similar WCO, not throwing picks? That's part of the WCO. High risk high reward. But you have to be confident and never doubt yourself or your skills (thus why Zorn's frustration with JC was his double clutching and hesitation rather than his incompletions or 7 yd passes on 3rd and 8).

Each coach and coordinator puts their own variations into the offense Walsh designed (based on Air Corryell which also gave us the H-back and Gibbs single back offenses). And coaches alter their system from year to year based on personel.