I have ICS on mine and still have the stock four TouchWiz icons. A fifth spot would be nice but I don't know what I'd stuff in there. Maybe the camera launcher or Gmail.
As my phone is right now those two icons are already on my center home screen (along with Maps and Firefox).
It's surprisingly quick, even with Flash enabled. I liked it for the desktop bookmark sync since it's my desktop browser of choice. Still I often find myself just using the stock browser in ICS.