From: http://forum.square-enix.com/ffxiv/threads/14633-New-interview-from-JP-4gamer-site吉田氏:
そこ は,レイ ドという 単語の捕 らえ方だ と思いま すよ 。例え ば「 WoW 」(World of Warcraft)のレ イドっ て5人,10人 のやつ がある 一方で,20 人越えの やつは「 そんな に人を集 められ ないよ」 って寂 れてい たり,完全 にハード ゲー マ ーコンテ ンツ化し ていま す。「EQ」(EverQuest)から 始まっ たよう な,レイ ド=大規 模 PvEって捕 らえ方 ではな く,攻略 性の高い コンテ ンツ, と 僕は考え ていま す。
YoshiP: That depends on how you take Raid, for example in WoW there are Raids that are for 5 players, 10 players, and also 20+ “Hard to get that much people” type of stuff. Stuff for hardcore gamers. I am thinking as raid is contents that requires strategy, unlike EQ (EverQuest) raid=large-scale PvE.
4Gamer:
それで は,プロ デューサ ーレター に書い てあるレイ ドダンジ ョンも ,大規模 戦とい うよ り,攻略 をメイ ンとした高難 度コンテン ツとい うことで すか。
4Gamer: So like it says on the producer letter, the Raid Dungeons are more of strategy content rather than a large-scale content correct?
吉田氏:
そう ですね。イ ンスタ ンス化し て,誰 にも邪魔 されない 環境 で,8 人で徹 底的に攻 略して くださ いとい う内容に なります 。以前 のアン ケートで もそう ですが ,今後レ ターの 中で,レ イドと は区別 して,大 規模 PvE は大規 模 PvE と呼ぶと 思い ます。
YoshiP: Yes, making it instanced and not being distracted by others. Having 8 players build a strategy to clear/complete. In later letters most likely will call a large-scale PvE, a large-scale PvE not Raid.
Dear YoshiP,
I know I'm nitpicking, but it's really frustrating that you're misusing this word. You reference WoW, which is a good thing since a lot of people learned the term overthere, but your explanation is incorrect...
In WoW a raid is formed when the size of one party is not enough. When you switch to raid style, you're able to bind up to 8 parties together. Making it possible for up to 5x8= 40 people to play together.
The properties of a raid are also different from a normal party. In a raid, you are unable to complete objectives of standard quests and minitargets of all raidparties, with their members, will become available. Plus /raid chatting (similar to /party) is enabled to cover all the parties.
In WoW "raids" are associated with large-scale PvE (and also large-scale PvP), because you start using raids for content that's designed for a minimum of 10 players.
The term you should be using for content that's instanced and requires strategy is "dungeon" or just plain "instance". A dungeon for a regular party is never called a raid in WoW.
A "raid dungeon" in FFXIV would be a dungeon for large-scale PvE content: 16+ players (atleast 2 parties bound together)
I hope this post is clear enough to show the proper use of the words "raid" and "dungeon"/"instance".