In a non-renewable resource market with imperfect competition, both the resource rent and the current market influence large resource owners' optimal supply. New information regarding future market conditions that affect the resource rent will consequently impact current supply. Bleaker demand prospects tend to accelerate resource extraction. We show, however, that it may slow down early extraction by producers with sufficiently large reserves and thus small resource rents. The reason is that the supply from such producers is driven more by current market considerations than concern about resource scarcity. As producers with relatively smaller reserves accelerate their supply in response to bleaker demand prospects, producers with sufficiently large reserves will reduce their current supply. The surge in shale gas production will reduce residual demand facing suppliers to the European gas market. We demonstrate the effects of this in a numerical model. Most gas producers accelerate their supply while Russia reduces its supply slightly and thus loses market shares even before the additional gas enters the market.