I am using Ubuntu as my main OS on my Toshiba Satellite M laptop. It is 1.7 Centrino with 1.5 Giga of ram and built-in graphics. I have tried PCLOS Gnome edition and Fedora 14 live CDs on this laptop and the thing that bugs me is that PCLOS and Fedora run much faster than Ubuntu( all having same settings- means no fancy effects etc). The launch of applications is a bit slow in Ubuntu as compared to PCLOS and Fedora. I know it might not be a big deal but I really wish Ubuntu developers to improve Ubuntu in this regard. Again it,s my personal experience on my laptop. Not sure if others noticed this or not.