A lot of the stories about falling with clipless pedals seem to indicate that the rider would have fallen in the particular situation even if they were using platform pedals.
The poll would hold more interest for me if it was strictly about falling when the pedals are the cause. In fact I would like to see that figure broken down even more so we could see if it was an equipment failure or rider memory error that was at fault.
I use one bike with platform pedals and three with clipless pedals and I feel a great advantage when using the clipless pedals. I'd hate to think we scared people away from using these pedals with our horror stories when the pedals aren't the actual cause.