I have followed John E for a very long time, way before I discovered Peter G. John worked for RBC and for RB before that. Of course I never had a computer when this first came about. I found that John had a 25% success rate on his picks back then, which was way better than other "experts" in his field. I still read his opinions whenever I find them, but I now can more D&D on his suggestions. With this said, a 30% gain is probably well within expectations.