Gregor is a good economics site because his points are well-documented and he has a good track record of being more right than the average economic forecaster. In general, the more pessimistic reseachers clearly have had the best crystal ball in recent years.
However, he has often touted peak oil theories and runaway energy costs in his forecasts, which I believe overstate the case for high future energy prices. One thing he underestimates, along with countless other economists, is the favorable impact of fracking in our energy future. He is also a bit contradictory by saying the world economy will stay in a funk and yet energy demand will continue to push up energy prices. Recessions and depressions dampen demand and thus prices.