Well i have heard rumors that izone will be the vip server for era. while playong today i realized when you gan chat the message at the bottom says "This message has been sent to 4 members on this server" then quickly changes to "this message has been sent to 4 members". i know this happened on classic shortly after classics vip server was released.
You will probably never see that. So more files your app downloaded so more it will lag. So if you got the files from 3 iServers in one app where only one iServer is enough to lag you out than have fun.