Played a Precognition in a T50 game versus GirlsGeneration just a few seconds ago. I drew a card, but her hand wasn't revealed.
EDIT: OK, ended the game a turn later because it seems somehow GG submitted a zero-card deck. Her deck icon showed a card count of "-1" when I played the Precog, so she decked out on first turn. Won three Relics - Relic must be the default card for the spins if it can't find a card to put in there.