I don't understand now why it takes a split second to load each skill icon. It makes interupting with a mesmer pure hell. I can't work out if the casting skill is a spell so can't work out which sort of interupt is needed. This is tempory Nightfall problem right?
I can't say ive seen a speed increase at all. I wish this was an option then since it is a big problem for me. PvE wise anyway.
I have noticed a decrease as well, but is that because this is a preview weekend or the new code? Is this some kind of new client focused technology designed to take the load off the servers? Who knows?
Usually, on preview weekends it gets really slow. However, on the lighter side of things I believe I noticed less lag this weekend personally than I normally would.