SKlug (Steven S. Klug), EverQuest Lead Programmer, posted June 22 on SOE forums:
The server side issues are still being investigated as I posted a week or two ago. The cause of the congestion is not obvious so we're adding a bunch more diagnostics. Those can't go out without a patch though, so we have to wait for the next patch to look at the data. But we're actively looking into it..