Sorry I'm so late in posting this (kept forgetting), but I had a thought...
Can you repost the poll with checkboxes instead of radio buttons? Is it worth it at this point? I think you might get more useful info that way. Let people check off the times that could work for them, then see what gets the most numbers.
I know I was confused by having a range of possibilities. I voted for 3pm, but 6 would probably actually be better for me. I just put 3 because it looked like it'd work for me and be easier for a number of others. Maybe that's not true, though. I don't really know.
Anyway... it's a thought.
Paul
