I think it's for effect.
If you have 1k in coins, you really need fiat bad enough that you will dump them on Bitstamp at up to $10 lower than you can get them elsewhere? Doesn't ring true to me.
Could be.
But my premise is not about 'needing fiat bad enough' it is about the value of a Gox IOU vs $'s at Bitstamp. The Gox $ IOU's appear to be becoming worth less (notice the space for the moment)
The major buys on Gox do not line up with the major sells on Stamp. Your theory holds no water.