I just feel the need to respond to this last post. I didn't submit to this job specifically because of the application requirements.
For starters, the "test job" was completely lacking in relevant technical details. (polycount, intended rendering environment, texture resolutions, normal/bump/displacement mapping options) This suggests to me that the person requesting doesn't actually know much about production modeling or animation. That makes me nervous.
My main issue with this post: I've worked both as an art director and a contract artist, and my experience on this issue can be summarized "Don't ask for free work, and don't do it if asked."
Anyone who has the time to create such a detailed and specific model at no cost is probably not a working professional. An art director who asks for such work "just to gauge your skills in modeling and following a discription[sic]" rather than using resumes and portfolios strikes me as lazy and arrogant.
A portfolio exists to show skill and areas of training. Resumes with contacts are for figuring out how a person acts in a work environment and how they handle various job aspects. Between those two, I've always been able to narrow down my field of prospective artists to a couple qualified candidates who I then interview. I've commissioned test pieces before when I was unsure, but the key word there is "comissioned". I
paid the artists for their time and effort, rather than assuming they
owed me free work for the possibility of getting a job.
Take a look at the application requirements for AAA gaming development studios, major publishers, or any other major and successful studio. Nowhere will you see "test piece" requirements for application. There's a reason for this.
The people who sent you resumes and portfolios are real professionals, and you shouldn't talk down at them for acting like it.
(EDIT: A typo of mine and a typo of his)