Stamp is the real market leader, even though it doesn't lead the movements immediatelty in real time, it is the fiat entry/exit portal which eventually controls where the price balances itself at.

-Gox: Does not have liquidity, and is mostly bots.

-China: Is becoming irrelevant and is probably entirely fake right now.

-Btce: Is mostly bots, traders, and trolls and has liquidity issues also.

-STAMP: Is where all the fiat enters and exits.