Is there any research about house churches?
"Perhaps the most compelling insight from the national study was an evaluation of the levels of satisfaction of those who attend a house church compared with the views of adults who attend a conventional local church. Four aspects of people’s church experience were gauged. Overall, people attending a house church were significantly more likely to be “completely satisfied” with their experience in each of the four dimensions examined. Two-thirds of house church attenders (68%) were “completely satisfied” with the leadership of their church, compared to only half of those attending a conventional church (49%)." (Taken from the Barna.com article, "House Churches are More Satisfying to Attenders than are Conventional Churches")