Originally Posted by
Tomana
No, they didn't. M'uru was killed in about 5 days. KJ about the same. BT was cleared in a week.
The only thing that slowed top guilds down were overtuned boses. Vashj was unkillable because of bugs, KT was overtuned as well.
As for LK, all the release tier was cleared in less than a week, iirc.
If you want to bash your head on an overtuned and buggy boss, up to you.
Problem is, you are pretty much forced to design raids this way, because they are extremely expensive to develop.
And if you restrict a character to only one difficulty during a given week, you'll be the first to complain.