The two great, successful religions - I'm sorry to brand it in such market-driven terms - of the 20th century were Islam, which grew pretty astronomically from about 300 million to around about a billion. The other one which is arguably even more successful was Pentecostalism, which went from nobody in 1900 to close to 500 to 600 million by the end of the century.
Taken from an interview on Lateline.
I heard once that the pentecostal movement in South America is the largest social movement in the history of humankind.* What I've also noticed in my time in Redfern is that those on the poorer end of the spectrum tend to be attracted to a pentecostal-style service over our often rigid Anglican ones.
In my opinion more biblically minded persons need to leave evangelical institutions and join a pentecostal church and become people of influence there.
*Ahh blogs, where all unsubstantiated claims roam free