Oh, and the Cumberland Presbyterians are, I believe, Presbyterian in government only.
Wow, nice summary! I'm cutting and pasting this so I can look some of this up later. I like to be aware of such things. For a high school history assignment I wrote a paper touching on the history of early American Protestantism and its roots in English and Scotch-Irish churches, and I've been interested in the general subject ever since then. Which of the groups you mention are historically most directly related to Colonial-era Presbyterianism?
heh heh heh...Jen, you outta take him over "there"...
Um... since I think they're all offshoots from the PCUSA, which was formed by the merge of two other denominations, I'd say they're all equally 'related'. The PCA and OPC are probably closest in terms of doctrine and government.