Exiting, where? There is not the corresponding selling pressure on bitstamp.
This. It's true that tens of k's are leaving Gox, but they are not showing up on Bitstamp at all. And this have been going on for months now. Just check the order books.
serious question: any idea on where are they going ?
Not to any exchange. Cold storage I'd say.
Or staying at MtGox, but out of the order book. 10k or more BTC suddenly coming out of nowhere (not corresponding with recent large transactions in the blockchain) in a big dump happens now and then. Keeping them out of the book makes an impression of buying pressure.