NASA experimented with tail stalls in icing conditions with a turbprop as can be seen on youtube:
YouTube - 1 of 3, Aircraft icing loss of control
YouTube - 2 of 3, Aircraft icing loss of control
YouTube - 3 of 3, Aircraft icing loss of control
NTSB reports to date show circumstances identical with what NASA found.
The last video in particular is a salutary warning to all pilots.
IF the pilot can identify the tail stall AND know what it is AND be dexterous enough to respond in time AND be possibly strong enough to handle the controls AND have sufficient altitude to recover then a tail stall may be survivable.