[citation][nom]DJ898[/nom]What do you think would be faster DVD or USB stick?[/citation]
DVD @ 8x = ~10MB/s
DVD @ 16x = ~21MB/s
USB = ~30MB/s
It depends on how many you intend to install. The installation portion would definitely be faster from USB. As shown above even a 16x DVD drive is going to Average out at about 2/3 as fast as a good USB solution. But considering the time it would take to generate the iso from a DVD, create the usb install and then perform the actual install, it probably wouldnt pay off (if done only for speed sake) unless you plan to do 3 or more.
Of course if you are downloading the iso (companies with volume license as opposed to retail) then that will reduce some time. But if you are doing volume license and intend to install more than 5 systems, you may be better off using something like WAIK and MDT to create a custom install and deploy it over the network.
This is really intended for a pretty limited audience. Non-Technical consumers, with a netbook or other DVD-less computer, a regular desktop or laptop with a DVD drive and no external (USB) DVD drive. For them, it is not about speed, its about limited options that dont require technical knowledge.