The Oceanic Six

So six people got off the island, supposedly. Who are they?

Jack, Hurley, Kate, Sun, Jin, Sayid

How were they chosen? By the numbers.

4, 8, 15, 16, 23, and 42

There were 71 original survivors of the crash. Assume for a moment they all were assigned a number 1-71. Out of those, numbers 4, 8, 15, 16, 23, and 42 were chosen to leave the island. Numbers 15 and 16 indicate a possible pairing. That leaves Sun and Jin or Bernard and Rose. Rule out Claire and her baby because the baby came later. Rule out Bernard and Rose because what if Rose leaves the island and her cancer comes back. Plus, Sun must leave the island in the hopes of actually surviving child birth.

Why Sayid? Well, my thought process here is far less scientific and deep. The third episode of this season deals with Sayid. So, it seems to me that the Oceanic Six would be the only ones doing the flash forwards for awhile, if the flashes are to be consistent with events occurring off the island.

Now, here are some burning questions I have read across the Internet:

Was that Christian Shepherd sitting in Jacob's chair in last night's episode? If so, is he Jacob? I sure hope not.

Why is the flight attendant Jack talked to in the pilot episode living among the Others? Was she one all along?

In "Through the Looking Glass," why does Ben tell Jack that "every living person on this island will die"? Is that to say there are non-living people on the island? It seems there might be.