Not to start a flame war with the knights of white and their undying faith to that which is Square-Enix's farts but ever since the "fix" on September 4th not only have instance servers (Duty Finder) lagged a bit sporadically now there's a hidden Duty Finder wait because there are not enough instances ready. For tanks and healers it wont be a big problem. What's a ten minute wait but for DPS it's just longer they have to wait.