Finally got 100 of 100 nobles impressed on the fight scene. Was still stuck at my usual 97 of 100, and knowing that I could go higher with a lot of luck (depending on what chain I got on the first 15 or so commands, which are all very restricted [side movement, triangle, and X only]), when I stumbled across an exploit on the PSP version. Basically, if you press the PS button on your PSP, it freezes the game. Unlike on the PS3 (which has a slight delay), the PSP freezes the action instantly, and pulls up a menu, with the regular game in the background. Shaded dark, but still visible. So you can freeze frame it right when the command pops up, see which one, and then hit it immediately upon resuming the game. Cheap? Yes. Worth it? Totally.
So, one bundle of gil and a Moonstone later, and I get to laugh behind the backs of the nobles who wouldn't know true acting talent if it hit them (an option which, unfortunately, we do not get).