I agree. My brother is now a Presbyterian and he has little knowledge if any of Calvin or his teachings.
I agree with the author. Calvin is essential reading for Charismatics, Evangelicals, Apostolics and Baptists. Dismissing him out of hand merely demonstrates that he has not been studied. His Biblicism is central to a conservative theology. Calvin stands opposite Schleiermacher who is the most influential theologian in the liberal Christian establishment.