Most people PIP'd deserved it. Most received a needs improvement message for several years in a row. Plus were not eligible for pay raise or promotion. They should have left voluntarily. This year with 8% instead of 3% in PIP. They have no chance of saving their job and they are leaving in a terrible economy and a really terrible o&g industry.
Former XOM people do well in other companies, if you leave in a normal environment. In fact many bottom 10% XOM people get significant pay raises by jumping ship (new employer assumes you are in the middle). Bottom line: if you are getting Needs Improvement message: Look for a job. In normal business environment the XOM on your resume looks great. But These are not normal times