I'm really interested in this thread because I just wanted to let some Dean plugs come over from America. Here in Holland we have nothing else but the Corally plugs, so we thought that the Deans were/ are probably better.
To clear up some thing about the Corally plugs:
This is the standard plug (straight, there's also a twisted laminates version)
This is the tube to mount on a wire
The tube on a battery
This is a plug with which you canot shortcut
This is the smaller variant. I use those in between the speedo and motor.
There is also an 1/18th scale solution:
Nearly everybody here uses these plugs and they work fine for me for some 12 years now. Never had a single problem using them, but I found it rather strange that this isn't a popular product in the US. For as far as I know, Deans is the biggest connector guy over there, isn't it?
I hope I helped you somewhat and I also wonder which of the connector is best for any rc-car application.