Ben wasn't suprised about the crash, we saw that last week, how quickly he reponded to a new emergency.
I was waiting though to hear how long ago Naomi thoght the lane crash was. I be it's longer than 90 days by her accout, but it's just a theory.
If Patchy didn't survive and this is a twin, it's an exciting twist, but I really don't think the plot is the same as the sixth sense, I see it more of a plane being planted in the ocean that looked like 815 to throw off investigators. The losties are alive, but it seems the Others are confident (as are those who set it up of the isand) that the losties will never make it back to 'civilization'...