Been away from GW2 for a couple months, but came back few days ago - this has been happening to me too. The load times are 2-3 times longer (but oddly, not always - seems random) and maps load their assets, static meshes, etc. really slowly. And when you load to a new map and look at your hero panel, it takes up to a minute for the game to load my character in it. Also mounting the skimmer sometimes freezes my characters for couple seconds and then it pops out of the gound like it was no big deal.