*WTB edit button for numerous types -,-

I don't think it subtracts for the prestige. If you're shooting for realm firsts, it likely means your groups aren't able to rely on being uber-geared from being able to farm the first couple bosses for several weeks. Your group is running in mostly heroic dungeon and rep gear, meaning their having to rely on strategy and skill.

I'm guessing that most guilds that are seriously dedicated to getting realm firsts raid for more than enough hours per week to make extending lockouts unnecessary. They're also pretty good at what they do, so I suspect that once they get a boss down the first time they don't have much trouble getting it down the second and third times. Plus extending lockouts would cause them to gear up more slowly, which might actually cause them to take longer to down bosses.

@Cephas - the people on the cutting edge of progression don't need the gear, though. That's why they get their World First (or Realm First, I guess) kills and then go on a break until the next tier comes along: they don't need this tier's gear to down the next tier either. And while I agree that they would be raiding enough to down quite a few bosses per week, it also takes them more than 2 weeks to get World First/Realm First kills (one week for reg bosses, one week for heroic bosses).