There's a LOT of professional level poser art. Having said this, I haven't seen many used professionally in advertising. Most of the ones I've actually seen in ad's are pretty lame compared to the stuff here. A lot of us use Poser to get the figures build and texturized, but use Vue or Bryce for the final renders, and then do a ton of postwork in Paintshop or Photoshop to finish it out. Poser is a great tool, especially in conjunction with other tools. Of course, the definition of "professional" is if you get paid for it. My art is by no means great and it doesn't compare to most of the good stuff here, but my clients like it enough to give me money or beer. I admit to getting a lot more beer for my work thank money (grin).