Labor Day Weekend 2x EXP & Drop Event: 8/30 – 9/1

I think a lot of the lag depends on where you're training.
Evo World and Dimensional PQ are notoriously laggy on 2x, because there's just one server (computer) serving all worlds.
Popular channels in heavily populated worlds also tend to get laggy.
But sometimes it doesn't matter where you go, the bottleneck is in Nexon's network.