After a few false starts, the WikiGrok test in stable has finally been activated. This test is for all logged in users of the mobile site for 1 week. I've updated the test documentation here:
https://meta.wikimedia.org/wiki/Research:Mobile_microcontributions/WikiGrok#Test_2:_All_logged-in_users.2C_en.wiki

The test officially went live at 00:41 UTC (20141212004100). We will turn it off next Thursday.

Ryan Kaldari