I don't know if SU should be the poster child for that theory.
I thought part of their decline was due to the turnaround that went bad, I don't think they have ever got back to expected production:
Post/wire say Suncor may miss 2008 production target
2008-07-04 06:23 MT - In the News
The Financial Post reports in a Reuters dispatch Friday that Suncor Energy is unlikely to meet its 2008 production target for its Alberta oil sands operations, analysts said Thursday, and may be forced to revise the goal for a second time this year. The unbylined item says Suncor, Canada's No. 2 oil sands producer, has forecast that daily output at its site near Fort McMurray, Alta., would average between 275,000 and 285,000 barrels per day (bpd) this year. However, production in the first five months of 2008 averaged just 225,000 bpd. June output was likely lower than that due to a longer-than-planned maintenance turnaround in part of the operation -- from mid-May to June 24. To meet the current forecast, the company would have to produce more than 310,000 bpd from June through the end of December. Some analysts doubt the company will be able to reach that goal.
