Man that last episode was a doozy! It's sort of a spoiler but I sorta expected him to wake up somewhere in that episode... Especially cause last i checked 10 minutes or less is usually when people should wake up... Though Damien IS an Atypical and Chloe did handle getting hit in the head with a lamp like a champ! So hey maybe Atypicals have higher durability! Which is so much more cooler, it's like Conduits from the InFAMOUS Game series!
Someone waking up within 20-30 minutes is usually a sign that they have a mild TBI. Given that a lot of the scenes in the finale happen simultaneously, the actual time span of the finale was about…30 minutes.