I've never been in a raid in this zone but have stood right by one, watching, with zero lag nor any slow down in terms of FPS at all and I was running 3 clients on one box.
I've never noticed a reduction in performance in this zone in normal play when compared to others, with clip plane maxed out.
Then again I do have a decent PC which can run 5 1280x768 clients simultaneously without slow down (although I'm not nearly dextrous enough to handle that many well

) and potentially could run 6 as it still had about 3-400mb ram free; if running three clients on my machine caused lag in a game as old as EQ then there would have to be something wrong somewhere else (either my connection or the server).
Because of that I think people suffering from issues might do well to also post their specs as this can help identify where the issue is.
The chances are this
is client performance related as the zone clearly isn't terribly optimised in terms of visibility (you can see for miles) and does have plenty of particle effects firing about all over the shop.
That said, has anyone tried the zone since the server upgrade? If it's fine now then perhaps it
was a combination of client bottlenecking and server packet loss at peak times?