Supply-Side Church Market?

Another interesting piece from the Wall Street Journal, commenting on the renaissance of at least some Christian groups in Europe. A bit weak on examples I would say, but it posits a worthy question on whether religiosity in an "open" religious market like the USA is helped by the wide array of options avaliable, suggesting this is occuring in Europe as well where state churches lose their monopoly and are out-competed by "lean and mean" new churches that receive no help from the state.