He's giving his personal opinion, but official pronouncements by the IEA have to be based on the best available data, which includes the highly overstated OPEC reserves.
For the IEA to develop their own estimate of actual OPEC reserves based on their own models would put their reports on chaky ground and start a political storm, so they don't do that. Can the last politician to go out the revolving door please turn the lights off?
