That's why it's a joke
PPSSPP is very low intensity for hardware, at least from what I can tell. Don't have much to test it on as far as very low-spec hardware, but... it probably works really well anyway?
Wow! You weren't joking! I just fired it up on a hand me down laptop with an AMD dual core @ 1.9 GHz and integrated GPU. CC: FFVII with Vsync on runs pretty well. I have a laptop with a better GPU but broken keyboard that I may start using more often. I'll have to look into how to take screenshots (assume it's more than print screen?) to give others with lower end hardware an idea of what it looks like.