They go faster, which does not mean better. Any group can do it even one with out a leader or one where no-one communicates at all.

[quote]Raid does go better with one person leading them. Just saying.[/quote] Yup, 100% correct.

not always ,if the leader is an idiot and doesn't know (or care) what the team members strengths and weaknesses are ,then it all goes to hell in a hand basket ,my last raid we finished in an hour and a half(roughly) with no leader because everyone knew where they would be best utilized before each fight and we communicated .