While those are valid points when considering a PuG raid, the difference is Nechja isn't joining a raid, she is the raid leader. True, some iLvl 251 things do get sharded in our 10s, however not a whole goes into the shard pile when people have dual-specs. Also, for our 10man runs, we have a pretty static group of people who have been running together since Naxxramas and some since Black Temple.