I have just done a highly unscientific experiment as to which operating system is the fastest to boot up from scratch, get a network and display my home page.
If it was a properly valid exercise then all machines would be identical in power, but they aren't.
First up is my main computer. It runs Windows Vista Home Premium on a dual 3.2 GHz processor with 4GB of RAM. It has the 2008 version of Norton Antivirus.
After 60 seconds it loaded the Windows Corporation logo and loading bar. After 1 minute, 25 it asked for a password. 1'39'' brought up the desktop, with the computer instantly connected to the wired network. iGoogle loaded after 2 minutes and 3 seconds. If I used the sleep facility I could bring it back to life in 14 seconds to a usable state.
Next I tried my JVC mininote 8 inch laptop - invented before netbooks were all the rage; but with more functionality. It's a good five years old but perfectly good running XP or Ubuntu Linux. But I decided to be cruel to it and put Windows 7 (Beta) on it to see if it works. It does work, depite the 512 MB of RAM not being enough to reach the required system requirements.
The little machine booted Windows 7 in 1'43'' but took an obscene 4'43'' to get a web page loaded. However the hybernate facility on Windows 7 appears to draw no energy out of the computer so can be used as an alternative to shut down. I re-awoke the laptop from hybernation in 1'21'' to view a web page.
A desktop computer with a pair of 2 GHz processors and 1 GB RAM booted Windows XP Pro in 42 seconds and loaded Google in a total of 1'30''.
A laptop with a single core 1.8GHz processor and 2GB RAM loaded a desktop in 1'12'' and got a web page in 1'27''.
Both the XP machines have AVG 7.5 installed.
The XP laptop also runs Ubuntu on a different partition. This took 1'34'' to load a desktop and 2'15'' for Firefox to display a web page. No anti virus is installed on this machine.
Finally, the old codger of a Mac I bought on Ebay a few weeks ago. This PowerMAc G4 has a 450 processor and 192MB RAM and is about 8 or nine years old. It runs Mac OS X, 10.3.9 - Panther. It booted the desktop fully in 57 seconds with Google loading in 1'45''.
So the winner is: Windows XP; loading a browser in a minute and a half on two seperate machines, but a lifetime achievement award has to go to the Mac which was ahead of a computer running a processor 15 times more powerful with 40 times more memory.
To make the experiment more valid I need to install the Beta of Windows 7 on a different machine and time that. It's not fair expecting it to work on an oldish laptop.