Put 200 apps, but not using it.
Note that benny complained on HOX. And his Note runs perfectly fine with those apps. And yes, I agree, nothing to do with cores. Was just an illustration

And it's good enough for your everyday use, not mine. I use my gf's SGS PLUS (higher clock speed than SGS1?) with minimal apps in it, and for the lift of me I can't stand how it isn't snappy enough.
S2 for me is snappier, but still doesn't help much.
Or put it this way, when I change hotplug tweak to off second core, I feel like pulling my hair out. It's not like it doesn't move. It does. App launches decently. Scrolling through app tray is decent as well. But not fast enough for daily use. And only variable here was disabling second core. On my S2. So yeah.
And as it is, I already wish my S2 was faster on a daily use. (messaging etc, not talking about gaming, which I haven't had the time to do recently)
Speed btw, not too concerned bout the lag. Can be mostly eliminated via reducing governor sample times, using scripts from fellow forumer pikachu, implementing good old LMKs if your ROM doesn't already have it, etc

Try installing 200 apps to your PC. Your boot up lag like turtle no matter how fast yoru machine...
Yes, i agree S2 is a bit faster in general UI usage...but it's not really something to shout about....
And the reason the SGS Plus is inferior to the SGS2....Andreno 205 (inferior GPU) and 512MB RAM vs 1GB, rather than the number of cores.