I think the Baptists are still ahead on that one.
U.S. Presbyterian groups include:
Presbyterian Church in the USA (2.4 million members)
Presbyterian Church in America (split from the PC-USA in 1973 and holds strictly to the Westminister Confession, about 300,000 members. It opposes ordination of women.)
Evangelical Presbyterian Church (formed by dissidents from the north and south prior to formation of the PC-USA; about 70,000 members; adheres to the Westminister Confession; ordination of women is not considered to be an area of essential doctrine.)
Orthodox Presbyterian Church (founded in 1936 by conservatives upset with doctrinal trends in the PC-USA foreign mission board; about 22,000 members; holds to the Westminster Confession as amended for American churches. It opposes ordination of women.)
Cumberland Presbyterian Church (founded as a result of the Cane Ridge revival that began the Stone-Campbell movements; about 83,000 members; rejects Westminister Confession and holds to unlimited atonement; it was among the first Presbyterian groups to ordain women.)
Bible Presbyterian Church (formed about the same time as the Orthodox Presbyterian Church, it has about 10,000 members; fundamental and anti-ecumenical, considers the PC-USA apostate; adheres to the Westminister Confession.)
Well, that's a few, at least.