Yeah, chat lag is like 45 seconds to a minute, group invites up to 30 seconds, and I'm not sure on mercs.
It isn't just on FV, but FV is usually more populated at any given time, so they get the worst of it. Hopefully, going 64bit will help server side, but who knows how much that will help the old code.
If you never zone, never invite people to group/raid, or chat with people I'm certain you don't notice the lag. If you do any of those things, along with a myriad of other actions lag is very noticeable.
It is not you or your comp, nor is it EQ. Thank those who control the web flow, and that rules were relaxed about priority service. Add in more people are using video connections to family during the holidays, and the average folk get slower service.