Don't look for the elephant in the room. Look instead at the colonies of mice that have burrowed inside the furniture and are now taking over the house.
"The latest research indicates that the number of house churches in Europe have already reached or surpassed 10,000, Australia could have up to 10,000, and New Zealand up to 6,000 house churches. Research in the US shows that between 6 and 12 million are already attending house churches, making house churches one of the three largest Christian groups in the country. In the case of Bangladesh or India, with many hundreds of thousands of house churches, the various networks of house churches have already become the largest Christian movements in their respective countries."
Wolfgang Simson, in the report he sent me this morning from last weeks summit in Delhi, India. Global House Church Summit report.pdf