I removed the cap from my SoA to test it, and it seems to cast instantly. Is that just me? Perhaps the result of a bug fix (I believe Kevin Dorner changed some of the "choose upon casting" spells) Manual claims it has Casting Time 1 round.
If it really should be that fast, it practically makes Time Stop redundant. Just cast one in the middle of a battle, set the trigger to See Enemy and load up on whatever you like.
[url="http://www.sorcerers.net/Games/BG2/SpellsReference/Main.htm"]Baldur's Gate 2 Spells Reference[/url]: Strategy, tips, tricks, bugs, cheese and corrections to the manual.
Let me rephrase the question: Does it cast as quick and near un-interruptable as Stoneskin?
[url="http://www.sorcerers.net/Games/BG2/SpellsReference/Main.htm"]Baldur's Gate 2 Spells Reference[/url]: Strategy, tips, tricks, bugs, cheese and corrections to the manual.