Nothing to do with Vista...
The "virus" in question is essentially a seperate OS of its own. It is booted by the BIOS completely independently of the OS. The exact same thing could happen to machine with Linux on it. Maybe even an Intel Mac.
In fact, Vista is probably the *only* OS that's "immune" if you use BitLocker. Good luck getting the virus to have an effect on a BitLocker system.
You see, this "virus" isn't really a virus at all. It's a bootable application that moves unprotected data on the hard disk. It doesn't do anything malicious or damaging. It's only a "virus" in that it would infect itself onto floppy disks and then spread to other machines when someone tried to boot to one of them.
Now, if you showed that the virus actually ran under Vista and infected new floppy disks - that would be a different story. However, I seriously doubt that's the case. Even then, though - Vista is certainly vulnerable to viruses that existed before it did. That's not Vista's fault - it's job isn't to be an anti-virus system. Vista blocks attack vectors, so that viruses are prevented from getting on your system. It does a better job of that than any other OS available today. But in this case, the virus has nothing to do with Vista. It's code was run before Windows had started - before the hard drive containing the OS had even been accessed by the machine.
The article should reflect that. Or at least, it would if it were written by a reputable source.