AndyC wrote:
It's intentional. Loading a bitmap to display just wastes time. The aim is to boot as fast as possible and that means no time wasted on frivolities.
Loading and rendering a bitmap... that would be measured in the microseconds (assuming it was already read into memory, but since it's a 16-color 640x480 image, that shouldn't take long). But the Vista "throbber bar" stays onscreen for at least a few seconds.
In fact, the Vista bootscreen looks practically identical to the XP bootscreen, I'd wager the little copyright notice at the bottom is a bitmap. In fact, I'd bet 50p the pixels are black because a bitmap says so (viz: it's loading and displaying a bitmap that's all black except for the little copyright notice).
So it isn't for "performance reasons", but just to de-emphasise the VESA-only part of the boot process, or because there was no way they could render the Vista logo in 16-colors without it looking crap. Therefore they went for the simplist thing possible.