Quote Originally Posted by radioactive_lego View Post
Reference? I maintain this is a rumor that has never been verified.

Also, WARs have a paltry MP pool, with limited MP recovery. what's the harm in popping a cheap potion to save aggro?
I admit to not having the reference, but I believe the delay is due to the following:

With regular GCD skills, it is possible for you to press the skill a half second or so before the GCD is actually finished and it will queue up the skill for use the immediate second the GCD is finished. With macros, I hear that this is not possible and you must wait for the GCD to finish before pressing the skill or it will not fire.