There's no doubt that the Reformation resulted in a proliferation of Christian sects, but attributing megachurchs and faith healing to that seems bizarre to somebody who is not a Christian. The Christian bible says that Jesus himself was a faith healer. Innumerable Catholic saints have been faith healers, and faith healing in the form of Exorcism is still taught as real by the Roman Catholic Church to this day. And megachurchs? No Christian church is more 'mega' than the RCC. They share all the defining characteristics: Huge gaudy megastructures? Yes, Cathedrals. Money flowing up through the organization? The Vatican is decked in gold. Hierarchical with the preacher at top living opulently? This describes the Roman Catholic Church to a T. And Jesus himself is said to have preached to crowds of hundreds or thousands.

The Reformation certainly lead to a splintering of Christian sects, but did not introduce faith healing and megachurches. These were already ancient, arguably originating characteristics of Christianity.