sorry for the delay, had some company drop over. i threw this image together for a quick comparison, its just a closeup of one of my irina character's head with no hair.

i used the settings you listed above, and where you listed a setting range (ie: 1-10) i picked the mean value.. and also my own settings that i normally use in a production quality render. timing is approx, i jotted down the minute i started and the minute it finished, so i could be off by up to 60 seconds either way.

images were exported out of poser as uncompressed .PSDs, the text was added and they were exported from photoshop at 80% quality. this is what i would expect from a gallery render.

suffice to say i use similar settings as the quick render in just 'setting up' a production render, but no matter how slow a computer i had i would never submit something like that in my gallery much less use it as a product promo. IMO toying with the render settings in such a way has a very useful application in saving time in any non-final render where one is tweaking lighting, shadow, textures, pose, etc... but if you are going to spend hours setting up an image, postworking it, etc then you are doing both it and yourself a disservice by reducing texture quality and shading rate.

cheers,
-gabriel