What is see is that the Presbyterian Church and reformed churches are losing thousands of members per year for the past forty years. Attendance has also declined very sharply in the past years. The growth rate of the SBC and mainline Baptist churches has increased. It is about 8% per year or about 900,000> individuals, +/- some. We need to look at why, the Calvinistic churches , are declining, and if it’s rabid Calvinism, we don’t want that.
Just as not every self-identified Christian is in fact a Christian so, too, is not every self-identified Presbyterian or Reformed church actually Reformed. A closer look at church growth by denomination shows that it's the liberal "Presbyterian" denominations, such as the PC-USA, that are in decline, whereas the conservative Presbyterian denominations such as the Orthodox Presbyterian and the Presbyterian Church in America are among the fastest-growing in America.
The teachings and practices of these two groups differ in many ways, but there's no doubt that those presbyterian denominations that are more Calvinistic are the ones that are growing, whereas the less Calvinistic presbyterian denominations are the ones seeing the large membership declines.
In pointing out this, however, I don't want to implicitly support the false notion that denominational growth equates with orthodoxy. It doesn't.
This does not suprise me. I would agree that it is not orthodoxy in itself that causes churches to grow, but it seems to help. On the other hand, liberal theology will empty churches in a single generation.