Just got an updated through AndroidCenter about AT&T sending Lollipop soak test invites. The news says that AT&T Moto X users have started getting invites to participate in this test. The Moto X to get Lollipop was first heard in one of the Online Korean Magazines.
This insures that AT&T users will soon start getting Android Lollipop update on their Moto X 2014 devices. Date, for the Lollipop update have not yet leaked, but it is expected soon before April. We might get the update first in the European countries.
Stay tuned for more updates!