Wood and plasterboard is still a poor insulator compared to actual insulation materials (they're around 0.035-0.038, with exception of PIR), but still much better than both brick and solid concrete.
Man you guys would be surprised how normal these tent-systems are in all sorts of industry manufacturing stuff. Yes they're "temporary" constructions, but in a very permanent kind of way. They're insulated, heated/cooled, have cast concrete flooring, rated for surprisingly high winds etc. They can easily be used for years without issues.
No bricks and concrete have high thermal mass, but they have fairly high lamda values making them very poor insulators
Bricks: 0.84
Concrete (dense): 1.4
Hardwood timber: ~0.15
Woodfibre board: 0.11
Plasterboard: 0.16
source
Wood and plasterboard is still a poor insulator compared to actual insulation materials (they're around 0.035-0.038, with exception of PIR), but still much better than both brick and solid concrete.