After using them for a while I can safely say:
Kotaku>Destructoid > Joystiq by speed of posting to original press release
Joystiq>Destructoid > Kotaku by exclusives (interviews and such)
Destructoid > Joystiq > Kotaku by community
Joystiq>Destructoid>Kotaku by contests
Destructoid>Joystiq > Kotaku by quality of posts (includes both information and entertainment)
OVERALL
Destrucoid>Joystiq>Kotaku IMO
And yes, bigger spaces mean a bigger difference.
Kotaku>Destructoid > Joystiq by speed of posting to original press release
Joystiq>Destructoid > Kotaku by exclusives (interviews and such)
Destructoid > Joystiq > Kotaku by community
Joystiq>Destructoid>Kotaku by contests
Destructoid>Joystiq > Kotaku by quality of posts (includes both information and entertainment)
OVERALL
Destrucoid>Joystiq>Kotaku IMO
And yes, bigger spaces mean a bigger difference.