At least I don't think it works, or need to be tweaked.

iPhone doesn't seem to save your browser state, OR video state (if you pause and switch tasks) on the browser. At least that's how an iPhone 4 from my cousin behaves.

I know I tried that on my Galaxy Tab and I couldn't bear using it. Since then I have given up on it. Maybe a heavily hacked Jelly Bean could do it?

People have suggested a multitude of hacks to enable multi-tasking-like activities on Android.

Which brings down the whole "user friendliness" it is supposed to have over Maemo/Meego/Mer.

On iOS though, I admit I have very little experience. Only using a couple of times borrowed devices. But overall, I think iOS is NOT smooth, it stutters and slows when I try to use it like I use(d) my n900 or Symbian devices. Overall, I don't really think it is better. And every single app people show me either makes me want to vomit (fart apps) or has me completely underwhelmed (oh, there is an app to access that site? Why not just use the browser instead?).