This is my first ragdoll, it is pretty realistic I should think, but when you get blown away by a grenade it may not be as good. I wasn't very sure about how people react to real explosions as I've never seen any, but I should think that a grenade which goes off right next to you will get to blown away a considerable distance.
The ragdolls are pretty light but they don't get blown away after getting hit but a couple of bullets.