Quote from Kapra;1220459:
I'm pretty sure NA does not have it, and to my knowledge KR is the only server that ever got that update. And I can see why, it can get pretty overpowered. Better to not release an update than release it and have to nerf things, in result nerfing everyone who uses casting speed from sources other than reforges.
Last I checked this was actually listed as a bug/glitch in the list of known bugs on Nexon Forums. I would suggest people give it another go as I no longer see it on the list except for this guy here:
"Fireball is not affected by Casting Speed reforges."
That's under known issues so I don't think you are correct there Kapra.
Source:
http://mabinogi.nexon.net/Community/forums#%2Fshowthread.php%3F1166656-List-of-Known-Issues%26nxid%3D10
Tested on NA just now with Thunder and we do indeed have the speed casting fix :)
11.73 -> 12% Casting speed, no vivace, no reforge
10.88 -> 12% Casting speed, no vivace, level 2 casting speed reforge
10.26 -> 12% Casting speed, vivace, level 2 casting speed reforge
getting similar results from multiple tests