It really is. Maybe the other's have noticed this but I usually find that one Walrus is more idiotic than the others. I'm constantly having to take direct control of Walrus 9 for some reason. The other Walruses will reach their destination and 9 will still be on the other side of the map trying to drive through a tree!
What makes that especially dumb is that I left him on the same road the others managed to follow!
* karajorma gets the bizarre idea of recording Walrus 9's shenanigans and posting them on YouTube set to the tune of The Lumberjack Song.