Actually, unless they changed something since I've been gone /shout in FFXI didn't always cover the entire zone. Whitegate was a good example were if I stood on one side of the zone I couldn't see people shouting on the other. I noticed the same thing during Beta when it was easy to test thanks to RMT: their spammed shouts disappeared once I got a certain distance away from them even if I didn't change zones.
So shout covers a large range, but not the entire zone if it's the same as beta.
Edit: Beaten to it!
Edited, Sep 22nd 2010 8:42pm by MasterOutlaw
Naiya | Mithra | Windurst | Rank 10 | 1st Lieutenant | Ragnarok
WAR: 75 MNK: 75 SAM: 66
RotZ: O | CoP: O | ToAU: O | Apoch Nigh: O
Naiyah | B.Elf | 85 Rogue | Stormscale
Doubleday | B.Elf | 85 Paladin | Stormscale