Whether what happened next is related to the beta test is not known, but it appears that a lucky Samsung Galaxy S5 owner ended up with Android ...
from Google Alert - Android https://www.google.com/url?rct=j&sa=t&url=http://www.phonearena.com/news/Lucky-unlocked-Samsung-Galaxy-S5-owner-gets-Android-6.0.1-on-his-phone_id76991&ct=ga&cd=CAIyGmIyMmYxNjAxMGEyYTM1MmY6Y29tOmVuOlVT&usg=AFQjCNEwtHwvhgqd8a6xE_9orYX-qSLeCQ