No. You'll need to use something like Nero. Though my personal experience with Nero is the more drives you burn too, the slower the overall burn, such that it almost didn't make sense to burn 4 at once, when burning 4, one right after the other was usually faster.
I have multi-burned with Nero (version 6) and it works, but it is slow. In my experience, burning fell to 4x speed when writing 4 discs at once - sometimes slower.
Are you using internal ATA drives? or external USB/Firewire drives? I know that ATA drives get saturated very quickly. I wonder if external drives would be speedier? Maybe serial ATA DVD R/W drives speed up the burn process?
When I first did this I was using ATA drives. I was contemplating trying it with SATA drives, but can't afford the premium for SATA right now on a DVD burner.