60% of new Windows Phone buyers are former iPhone and Android users

I have written previously that based on the trend setup by t-mobile's Lumia 710 sales the most likely buyers of Windows Phone will be segment new to smart phones, former feature phone owners.

However, recent poll shows that only 15% of buyers are former feature phones owners. Most of the new buyers of Windows Phone are past iPhone and Android users, 30% each. People are leaving iPhone and Android for Windows phone