The entry of Nissan and Mercedes has been widely-publicised. By saying that the VF won on debut, Holden are implying that they are in the same boat. While the VF model might be new, Holden themselves are not.
It's one of the first rules of marketing: if you can get an advantage by stating something true and letting your audience come to a conclusion that is better for you, do it. It's like milk in Australia. Woolworths are advertising that their milk is "permeate free", which it is. But it's also misleading, because it implies that other brands are using permeates, which they aren't - because permeates haven't been used in the production of milk for over forty years. So Woolworths are basically saying something that is true, but taking advantage of the audience's lack of knowledge to make out that they're doing something different when they aren't.
Holden are doing exactly the same thing here. They're taking advantage of the publicity the new makes are receiving to make out that they are just as new. Which is ironic, considering that when the Car of the Future programme was first announced, Simon McNamara publicly announced that other manufacturers should not bother with entering the series, because they wouldn't get anything out of it.