Mightily? In the 18th century United States, better than 95% of Protestants were Reformed. Now, there are less than 5%. There aren't any Reformed Methodists - they rejected Calvin going all the way back to Wesley. I'm not sure that any Congregationalists are Reformed any more. I know that over 90% (I think the last time I looked it was 93%) of Presbyterians are not Reformed. And perhaps 10% of Baptists are Reformed.
We'll pause while you cite the numbers for the OPC, but please check out the numbers for the Presbyterian Church in America which is growing throughout the US and the world.
We all know the numbers of the OPC - plummeting faster than the approval rate for the Democrat Party. Why do you keep bringing up the PCA? Why do you not join them if they are so good? But increasing? When you are tiny, any growth can appear to be of interest. But let me ask you this: if the OPC and the PCA in their entirety gathered in any place in the world - even Iraq or Afghanistan - do you think that the Muslims would even care? They wouldn't. Not even the Muslims would call the remnants of the Reformed Christian.
No other religion in the United States has lost more members to other faiths, or to no faith at all, than Catholicism, according to the new survey released by the Pew Forum on Religion and Public Life. The survey, conducted in 2007, found that 31 percent of Americans were raised Catholic, but less than 25 per cent of them still identify as Catholic...
The enemy of my enemy is my friend, eh? The odious Pew crew hate Christians - they only identify as hating Catholics more. Perhaps you might research them as to the other findings that they have presented. Straws...
I fully expect you will provide a current survey from a "reputable" source. Reasonable huh?