This was actually my thought. Looking at the mockups he submitted, it is clear that this was 30-40 hours of work minimum. And depending how fast/slow they worke

This was actually my thought. Looking at the mockups he submitted, it is clear that this was 30-40 hours of work minimum. And depending how fast/slow they worked it could be much more than that. If I asked a candidate to spend 4 hours on something and they come back to me with 40 hours of work, it isn't what I asked for. Despite it being potentially amazing, that person ignored the task. A 4-hour task would probably yield 1-3 mockups. Maybe a launch/splash page, the home leaderboard page, and then a page showing the details of a specific user. Even these 3 pages would be pushing your 4 hour time limit, but that is really the most I would expect. So if I was interviewing and comparing candidates and one candidate submits a 40-60 hour project while the other candidates submitted a 4 hour project. I can't really compare the two. I would probably throw out the guy that ignore what I asked them to do by spending 40-60 hours of work on something I only wanted 4 hours of work on.