Question re: quad core on macbook

Hey guys....I am new to the mac scene but really looking fwd to my first mac...

just a query...

I dont mind waiting a little....so i ask this..

Do you think Apple will first implement the quad core mobile chip on the macbook pro only?

any chance we can see these on the 13.3 macbooks?

I want to get a macbook 13.3 but wondering if i shld wait to get the quad core....but then again don t want to wait a year or 2 before they become the standard...

but just wondering if apple would probably just update the pro line with these?

what say ye?

thanks


ps: as a side....if i were to get a macbook today....is there a decent perf difference between the 2.0ghz and 2.4ghz? tx