As long as Blizzard continue this road, to have Public Test Realms where guilds can play freely the bosses before come to live, we will have results like that where 1st day of HC release, we have guilds have killed 10 of 14 bosses in Heroic Mode. Is this result what Blizzard wants? I don't think so.
Blizzard is maybe one of the richest companies out there. They should create internal beta testing teams, with Quality Teams that DONT BELONG IN ACTIVE GUILDS. Test whatever they like and then release it.
What's the point really? World 1st race is a joke...