The author has a valid, if obvious, point - the difference of opinion reflects class differences among Evangelicals - but what about his conclusion:
Are we witnessing the implosion of evangelicalism? Evangelicalism as we know it has its roots in the eighteenth century but really took shape in the nineteenth, so I guess two centuries or so was a pretty good run. My sense is that evangelicalism has always been more sociologically than theologically determined, and I suppose its appropriate that sociology is now the engine of its demolition.