Well I didn't say it is "so bad". I said it's weak and the fact that it's running NFS or other games doesn't change that. I have a Core2Duo E7500 desktop and it can play almost everything, even GTA IV at high but if you compare that to an i3, you'll realize how weak it actually is. Keep in mind that weak doesn't necessarily mean bad, as an i3 is weaker compared to an i7 but this doesn't mean it is bad at all.
To answer your question more clearly: The A8 is somewhat equal to first generation of intel i3s. But at the end of the day what you want to do with it matters not the sheer processing power.