The Guild Wars team has updated the patch page with the latest skill balances applied to the game. It appears that the Mesmer received a LOT of attention from devs. Check it out!
Fast Casting: functionality of this attribute changed to: "Fast Casting decreases the activation time of your Spells and Signets. (No effect for non-Mesmer skills with an activation time less than 2 seconds.) In PvE, each rank of Fast Casting decreases the recharge time for your Mesmer Spells by 3%."
Activation Time Cap
Items and skills that improve skill activation time can no longer stack higher than 25%. Single effects that improve skill activation over 25% can exceed this cap. (Fast Casting is not included in this cap.)