Having just got a Virus myself and looking at the forum for the first time I had to respond to this.
Firstly the Skrillex bass sound was designed on FM8 which means no modern talking wave forms anywhere in sight, Second, to get the sound a lot of other plugins were used, eq's, filters, maybe even a vowel filter, all were automated... Check youtube for endless recreations.
I have had my Virus since Christmas day and can safely say that it is more than possible to achieve the growl using the Virus, I have managed something quite close already... Many people use Albino to get that sound as well...
I have much to learn with the Virus but one thing for sure is it is not just a trance synth! I am a DnB producer and love this synth over everything, already! 
Thanks.
