I think I noticed this too today but I cannot exactly explain what it was. Maybe spellag but it definitely felt different than the spellag I'm used to. The casting felt much slower. I thought they had nerved something with our casting speed and checked the numbers but everything was looking ok.
Another thing I noticed today was an issue with my running speed. I ran much slower compared to my groupmembers today. It was like running with in-combat speed after the fight had ended. 5 to 10 seconds later I was running with normal speed again but the displayed run speed didn't change at all. This happened every fight and I had absolutely no effects or buffs on me that could have caused this.
Maybe something in the game mechanics isn't working correct.