You know how there's a feeling that Jp groups generally do better? Well it's because when someone stuffs up in a Jp group (through inexperience, nerves, or whatever) they'll either:
A) Have another go
B) Stop, explain what to do and then have another go

I was in a Jp Garuda HM party the other day with two pretty rubbish DDs, and we wiped a couple of times. Third time it was all explained properly, without name-calling or singling anyone out ("This is what *you* need to do so *you* don't screw it up for *everyone*" isn't helpful) - we wiped. Fourth time went perfectly, the BLM got their weapon and now there's two more players who know what they're doing when they do DF Garuda. US/EU groups could be this good if only we spent more time encouraging and explaining instead of whining and gear checking.