More like half an hour for each, and i didn't use Mudbox. The guy with the goggles was a quick doodle of a potential driver of my Fzero-racer edit: Roo, squarebrush 4 life!
You guys inspired me to actually sit down with it for something more than the usual "getting acquainted" doodle. First real attempt to do anything with it. Obviously didn't get to finish, but needed some sleep. ~45 minutes. Just got finished playing Arcanum and attempted to capture the Half-Ogres.