It wasn't too bad when I started playing at around 04:00 GMT, but it started getting pretty bad at around 7:00 GMT. Granted, I was in an 18 player raid group, but it became pretty unplayable. All of The Wastes were layered. Hopefully the Spring Festival starting tomorrow will take some of the load off. They may have to thin some of the mobs out (the crebain and crawlers were really dense in some parts of the landscape). Other servers are experiencing the same lag.