Speaking from the standpoint of having developed software for a high-end printing solution, it is highly unlikely that the drivers were separately optimized for these applications and that they sell them separately from the standard drivers. It is more likely that the drivers recognize a flag in the bios that tells the drivers to turn on the optimizations.
Way back when the GeForce II was available, there was a hack that involved repositioning a resistor on the circuit board. If you did that, the card was then recognized as a Quadro II. The "gamer" drivers recognized the card as a Quadro II and all the options for it were available in those drivers.
I would not put it past Nvidia or ATI to use the same sort of methodology at this point, that is, to use the exact same software developed by the same developers for different purposes. It is the most cost-effective and profitable means of doing so. The workstation application market is a "professional" market, and it has deep pockets. That said, it is interesting to note that the article says
but as soon as you load a professional graphics application such as Maya or 3ds Max and import a complex 3D model
. The operative words are "complex 3D model." What level of complexity is a matter of interpretation, however, this implies that simpler models are a different story, and that the difference in rendering quality may not be significant with a simpler model.
So, what does this mean? If you are doing serious engineering work where your models have hundreds or thousands of parts, then these cards are worth the extra money. However, if you are a part-timer, or your models tens of parts, you a "gamer" card may suffice for you.
I own Solidworks 2003, and I have an 8800 GTX 512 MB card. The machine I run it on is a 2.8 GHz dual core Opteron. For what I do, the power here is more than enough. However, it is great to see the comparison against "pro cards" and it is also great to see the price of these "pro cards" come down significantly. I hope the gaming comparison continues in future "pro card" reviews.
I would also love to see a review of these super expensive quadros where they compare them against the identical "gamer hardware."
The question is do you really need the X increase in performance, and is that X increase in performance worth the XX increase in price.