I hate PC's that do that.
But i guess it is supposed to stop the ignorant from fiddeling.
Of course they fiddle anyway, so it really only acts as a free advert for the maker.
I think the screen is loaded into the bios, so the only way to get rid of it, unless there is an option in the bios settings to 'disable splash screen', is to flash the bios with a BIOS version that does not include the splash screen to start with.
But i am sure that someone will come up with a workaround, if there is one.