Trials in particular have been hit with horrific lag the past week or so... it's almost impossible to play at times. I had a healer drop my Vet Rockgrove yesterday complaining of the lag, I jumped onto heals and immediately after switching toons I got hit with the same terrible lag spikes.
Then had to replace several DPS for the same reason, only to have the incoming DPS all having the same issues.
This is awful for a game that is this old into it's cycle to still be hit with such a basic fundamental problem time after time...
Don't know if it's coincidence, but this all started when Vengeance/Gray Host were added in combination to the PVP options.