David Benedict, Baptist historian who lived 1779-1874, wrote this in his book “Fifty Years Among The Baptists” –
The Philadelphia Confession of Faith, published in that city, in 1742, was the standard of most of the oldest Baptist churches in this country, especially in the middle and southern States. This Confession was copied mostly from one published by the Baptists in London, in 1689, and this again agreed in its doctrinal sentiments with the Westminster Confession.
The old Baptists in New England, although, for the most part, they held with their brethren elsewhere the doctrines of Depravity, Election, Divine Sovereignty, Final Perseverance, etc., yet they were not in the habit of enforcing them so strongly as were those in New York, Philadelphia, and further South.