Looks like the servers are out of synch again. Either that, or I used my psychic ability to predict Backstop's question and answer it before he asked it.
I'm not sure how serious Deffeyes is. But I think he does believe in Hubbert's method. Hubbert's method isn't much affected by new discoveries. Hence the U.S. peak was in 1970, as predicted, despite the huge Prudhoe Bay reserves which Hubbert did not consider. Deffeyes argues, convincingly, that because production is so high right now, it will be very difficult for new finds to make a real difference. We cannot replace all the existing, declining fields with new finds. And he thinks Ghawar is going down fast:
$this->bbcode_second_pass_quote('', 'G')hawar, the supergiant Saudi oilfield, is producing increasing amounts of water along with the oil. When Simmons sent Twilight in the Desert to the printer, the water cut at Ghawar was around 30 percent. There are later reports on the Internet (home.entouch.net/dmd/ghawar.htm) of water cuts as high as 55 percent. Ghawar has been producing 4 million barrels per day; when the Ghawar field waters out, you can kiss your lifestyle goodbye.
I don't think he's serious about the exact date of peak oil being Dec 16, 2005. I think he is serious about us being past peak now.