TradeHill has no cash withdraw limits, free security, far better security, they did it of their own accord before the Gox incident, 3rd party verification of their security and business finances, and lower fees, and that Duo security shit they use is super awesome and easy to use, free for the user, and can be used with your phone instead of having a brand new thing you gotta keep somewhere. But Gox still has 10x their volume.
Yes, the power of being first does go along way this is true...