I think its a misnomer for anyone to think they may get hired based on the camera they own.
Perhaps, but I've been directly told by producers that if I don't own camera "X" then they wouldn't consider me. SO while you might not get hired because you own the newest toy, you certainly could lose work if you don't. There are many a thread dedicated to jobs lost by AF100 owners because producers wanted a Mark II, etc...
It's stupid, but it does happen.