It's working fine now, please feel free to give it a try again!
65 respondents now. Here are some highlights (only including campaigns that have received 5 or more responses in these areas):
Role: More DMs than players are answering in general, which is no surprise, but it's more balanced than I thought it might be.
Flexibility: Dragonlance and Rokugan are showing up as the settings that are a bit more difficult to add new material to, while Greyhawk appears as the setting it's easiest to smoothly add new material to.
Completeness: None of the settings seem to be missing much material, though Arcanis, Dragonlords of Melnibone, and the Iron Kingdoms show up as being slightly below average. Forgotten Realms registers as the most complete, with plenty of material.
Power Level: Nyambe, Ravenloft, and Sovereign Stone appear to be slightly below average in "power," while unsurprisingly Forgotten Realms is quite a bit above average. Somewhat of a surprise to me, so too is Oathbound (though I admit to knowing little about the setting).
Fantasy Type: Dragonlords of Melnibone, Midnight, Ravenloft, and The Hunt: Rise of Evil are all dark fantasy. Bluffside, Dragonlance, and Forgotten Realms all appear as the "highest" high fantasy of the settings rated.
"Generic Fantasy" Compatibility: Five different settings show as being the least compatible (that is, that campaign-specific stuff works well but off-the-shelf non-campaign material doesn't fit in as well): Dragonlords of Melnibone, Nyambe, Ravenloft, Rokugan, and Swashbuckling Adventures. No big surprises there, I don't think. Greyhawk comes across as the most "compatible" or, alternately, most "generic."
Immersiveness: None of the campaigns appear to be particularly "shallow," and interestingly both Iron Kingdoms and Midnight are coming across as being very "deep."
More summaries later. Feel free to add your thoughts if you haven't done so: the more that are added the more meaningful the results!