The "one wire short, one wire long" method works very well until you come across a battery pack that has the polarity reversed from what you are accustomed to. Then you either plug them in backwards or if you are lucky, find out you have to rewire your speed control. I suppose you could just always stick the the same brand of battery, but over time that is unlikely.
I've used a set of "fake" Deans XT connectors that actually work fairly well. Don't know how their efficiency stands up next to the real thing, but connectors are made of Nylon which is less prone to melting if you get the metal part too hot while soldering. They also have ribs that make them easier to grab. Only problem I've run into is the extra metal clip designed to keep tension on the blades broke off after it wore from use and got caught on the plastic while trying to plug it in.
EDIT: here's a link to the ones I've used. I didn't get them from HK, but this looks exactly like them.