I haven't read all the posts in this thread so this may have already been commented on but did anyone notice that the X-Men 101 and the Howard the Duck 1 were very similar in condition but one was 9.0 and the other 9.6? My guess is the grader missed the corner crease in the bottom right corner of the 9.6 but it's funny because it is the exact same defect that brought the X-men 101 down to 9.0 which is the grade that I think most people think Howard the Duck 1 should have gotten.
Out of the 20 books presented the one that still confuses me the most and I still haven't read anything that clarifies it much is the 4.0 on the Marvel Spotlight 5. I have looked at that book multiple times trying to justify that grade and I still can't do it. I realize it is an "ugly" copy but that usually isn't as significant a factor in determining grade. I have seen many "ugly" books in much higher grades including 9.8. How many times have you seen 9.8's with multiple spine ticks, bad centering, and color rub? There are always plenty of gorgeous examples as well as ugly ones for every grade but they still get the same grade. People made reference to the amount of foxing on the book but I have seen excessive foxing on books that get 6-6.5 grades with similar structure. Look at the War Action 2 from the 4th round, it has what I would consider to be a major amount of foxing and is in a lesser condition structurally than the Marvel Spotlight 5 but it got a reasonable grade. I actually think the War Action 2 is a 5.5 but 6.0 is reasonable. To me anything below 5.0 is not reasonable for the Marvel Spotlight 5 book. With a defect like foxing once you have more than a moderate amount it shouldn't cause the grade to drop any further and with the structure of the book being mid-grade I think grading the book at the bottom of that range to account for it's overall lack of eye appeal would put it no lower than a 5.0.
Those are my thoughts, I would love to hear what other people think as long as it is something more in depth than just how ugly the book looks because we can all see that for ourselves.