4Gb and Vista installs slower....

I was a little underwhelmed by the installing vista from a USB memory stick. It really doesn't seem that much faster. However while surfing around to various people who commented on Jeff's PC building series I came across someone having problems with 4Gb installed. Thankfully I was not having that problems but I noticed Jeff had replied saying that the vista install went very slowly wiht 4Gb - so I followed his advice and removed 2Gb temporarily. Things seemed to have picked up a bit though the 'copying files' stage still seems to be VERY slow considering I have a fast USB stick and a 10k SATA drive receiving. Oh well I guess it will get there eventually - I've already restarted this too many times.