Hey Joph, you may want to try this edit. It changes the FOV so it's more compatible with PCs, and should help with the hiccups.
Quote:
steam\steamapps\common\Quantum Conundrum\Engine\Config
Make sure you go to ENGINE, and not TryGame
Open BaseInput.ini
Under general bindings, add this
Bindings=(Name="F12",Command="FOV 110",Control=False,Shift=False,Alt=False)
Change the FoV to whatever you want, press f12 when you're in game to apply the change.
http://forums.steampowered.com/forums/showpost.php?p=31262465&postcount=9