Run on 1200$ activity was only chinese activity. Consider that in these day there were an high volume on the market. But at the same time I consider that Mark Karpeles with its activity has contributed so much at the raising of price !
no, it was mainly mtgox, i saw all the live trades and gox always broke big walls first, then chinese exchange followed with higher volume (like now okcoin, but now okcoin controls the market).
Also, there were 2-3 small crashes during the rally, and then mtgox stopped the engine to prevent that crash
. And the chinese exchanges were not able go lower than the price where gox stopped trading.