All of the guilds that raid on Europe times zones get completely gimped by the server lag since there's 6-7k online.
Some may find this silly but it really does make a huge difference, this lag is not like the standard latency lag, it's different and it screws you over A LOT more.
Grizzly would never have been able to down Ragnaros with the current lag on the server(Sunday evening, 7k online.)
This needs to be solved somehow.