While bearish prices had an impact on U.S. oil, OPEC was not affected and, in fact, may have been spurred onward. Other surprises in the bear market were found in the strong production performance of some non-OPEC suppliers.On Monday of this week, we wrote about the crude oil and refining situation in the U.S., documenting the reduction in the rig count and production. This is not the case with the world market, however. According to the International Energy Administration, global oil supply growth remained at 3.2 million barrel per day (mb/d) for April compared with April 2014, a very steep trend line. At 95.7 mb/d, total oil supplies were flat from March as higher OPEC output offset a drop in non-OPEC production, including that of the U.S...