A friend recently wrote me about some people he knows who have left evangelical churches to join more traditional churches, such as Lutheran and Orthodox churches. I don't know that there is a flood of this going on, but I would certainly say it's a trend.
I wonder if the reason is that there is a longing for structure. When I became a Christian (early 70s) there was a lot of rebellion against authority and its structures. The cry was that, "Jesus can set you free." Now, I think that longing for freedom has spent itself, possibly because there don't seem to be a lot more freedoms to get. I think people are free to do just about anything they please, including - they percieve - in their Christian lives. Perhaps now people are missing a sense of structure, and insofar as churches have structure - and I think more ritualistic churches at least appear to have it - they will attract people. Maybe it's time to bring back the black robes, Geneva collars and candles.