I love to see these large purchases with this kind of slippage. Is very likely that these coins are leaving a traders hands and moving into a medium to long term investors' -- someone who does not care about 1 to 3 percentage points.

Especially an early-week purchase -- funds hit the exchange, so buy the coins.
Sure a trader could do this to try to spark a rally, but that's a VERY dangerous game; a lot more dangerous with a lot less upside then just buying at 65 to 75 and holding for a few days

Something else to think about:
We dropped to 65 and then right back where we started at 100+. Did ANY money leave Gox AT ALL? Or was this all just long-term bull traders trying to outfox each other?