I took some measurements:
From 100/100 to 0/100 thirst -> abt. 30 minutes
From 100/100 to 0/100 hunger -> abt. 45 minutes
Character was pretty much idle, she stayed inside a small sandstone hut all the time.
There was no temperature indication of any kind.
Gruel now spoils in 24 hours instead of 70+ before the patch.
(Server settings have not been changed. Playing single player/PC)