I highly doubt it's the CPU speed stepping down that makes it feel slow. You can try it, but I bet you could play Farmville on a tablet so I don't think that's the reason.
Worth a try to turn off C1e and speed step and seeing if there's a difference though.
I thought C1e only affects power
EIST dynamically scales voltage and frequencies at load
C1E scales voltage and frequencies at idle.
Its not the CPU, thats for sure. Crapville is also a flashgame with a server connection of some sort I guess.