One measure of Obama's appeal to SDs is a comparison of Obama states with limited Clinton SDs, and Clinton states with limited Obama SDs.

Let's look at how this comparison works for the candidates earning either 0 or 1 super delegates in their opponent's states/contests.

For Clinton states:

0 SDs for Obama - 2(AR, GU)
1 SD for Obama - 1 (NY)

For Obama states

0 SDs for Clinton - 8 (MT, SD, WY, NE, ND, ID, IL, MS)
1 SD for Clinton - 9 (UT, AK, NC, OR, KS, ME, CT, VT, DA)

Clinton won 1 delegate or less in 17 Obama states, Obama in only 3 Clinton states. I see that as a pretty powerful metric of super delegate appeal.

And Guam is an anomaly. First, the election is this week, so there is a good are reason for supers to hold up. Second, there are only 5 supers and only 1 has endorsed Clinton. And, of the remaining 4, there are two vacancies.