Came from Storm 1 which I never had a problem with other than horribly slow browser. No random reboots, no dust, no dropped calls. The "had to be something better" internet speed got me interested in Android and the INC. Clearly there is no comparison. Speed, keyboard etc the OS is light years ahead of RIM. I was a little dismayed at Android's email handling compared to BB until I discovered K-9 about 10 hours after I got the INC. gMail push and attachments are every bit as good. Granted if I was on Exchange I might feel differently but I don't know that. There is no way I would go back to BB and the RIM OS at this point. It would be like installing XP on my Windows 7 PC.
Not sure why anybody is surprised at the high migration from BB in this poll. The BB market share in smartphones is huge. There are obviously more users available to switch. I am not sure it says anything statistically viable about BB.