...is that they can be adjusted to fit just about any situation.
The Saudis have (for many years) virtually all of OPEC's excess production capacity. Meaning that they have the ability to produce significantly more than they elect to in any given month. Because of this, you can't tell whether a given increase/decrease is due to their choice to produce less (to support prices), or because they
can't produce more (due to peaking).
A PO theorist will see peaking in virtually any decline - regardless of other information. In this case, other OPEC nations have been exceeding their quotas and increasing production (Iran comes to mind), and the Saudis have been cutting production to keep that "cheating" from slamming price levels overall. Recent analyst takes on the market indicate that we'll see more of this in months to come. Stockpiles are large enough to make peak production claims impossible to prove - the demand side is still driving this bus.
As we stated two weeks ago, the only real solution for the current high level of crude oil and product inventories is a production cut by Saudi Arabia. Saudi Arabia in August cut its production slightly by 0.1% and Nigeria's production fell by 1.5%, but Iran and the UAE boosted their production respectively by +0.5% and +0.4%, thus causing overall OPEC production in August to be virtually unchanged. Crude oil prices have so far only traded on a mildly bearish note, meaning the more recalcitrant members of OPEC feel no urgency to cut production at present. However, Saudi Arabia, as the swing producer in OPEC will have to take early action to cut production in coming weeks or risk a breakdown in oil prices.
http://www.insidefutures.com/article/176013/Futures%20Outlook%20-%20September%2017,%202010.html