At last week's General Assembly Mission Council Meeting we saw a report on call trends in the PCUSA. Here are two graphs from the report.
In one discussion, Bill Carl, President of Pittsburgh Theological Seminary, said that an increasing number of graduates are not looking for a call to an exsiting congregation. Instead, they are going out and gathering people together in communties for study, nurture, and worship. Many of these communities may not be what we typically envision as a PCUSA congregation. I don't know how to quanitfy his observations but clearly major shifts are emerging in how calls and congregational formation take place.