No it doesn't. the emulator lies.*Ouch* ^.^
Actually, EX5 is the only thing that makes the battles in Bakugan Battle Brawlers and the ship-part of Zelda run at any decent speed for me. Both 3D-heavy, mind you.
based on my experience (i've beaten KH japanese version already)..enabling any of the ex option with KH makes cutscenes freeze at some point or when its about to end...however on some places and part of the game (like in olympus), the game runs pretty slow, but enabling ex 3 will fix it (just be sure to disable it before you complete the mission or else, if theres a cutscene to follow, it might freeze)... maybe im wrong, but thats what i've encountered with this game...3D-intensive games commonly have that problem. Try EX0, 3 or 5.