The reason that "Peak Oil" is really "Plateau Oil" is because our worldwide infrastructure supports the processing of 84 million barrels a day and we have now approached that.
This is plainly seen in the data
By now most everyone acknowledges that world wide oil distribution is refinery limited.
From The Qauari Energy Minister: Nov 2007:
Now technically it looks like there will be an increase in refining capacity in the year 2010 and this will remain a qualitative statement that will misrepresent the problem. The truth is that refining capacity is only going to increase by 1-2% which has very little impact in the supply and demand world.