Aside from not understanding the gap between early Baptists and Protestants, the quote you use has nothing to do with linking modern Baptists to being reformed. In fact, they are two separate questions. You have already been proven wrong on the question of Baptists being Protestant.
Particular Baptists can trace their origins back to 1630. The Baptist Confession of Faith of 1689 is written along reformed theology.
From the Theopedia, this is a summary of reformed Baptist beliefs today, which do not exactly parallel Presbyterianism.
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The centrality of the Word of God: the church takes no part in human schemes for church growth, nor searches for popularity, but sows the Word and trusts God will make it multiply.
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Creedalism: historic creeds of the faith are considered useful, but not necessarily authoritative.
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The Regulative Principle of Worship: the belief that "the acceptable way of Worshipping the true God, is instituted by himself; and so limited by his own revealed will, that he may not be Worshipped according to the imaginations, and devices of Men, or the suggestions of Satan, under any visible representations, or any other way, not prescribed in the Holy Scriptures," (from chapter 22, paragraph 1 of the London Baptist Confession of 1689). This is usually manifested in a relatively simple liturgy.
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Covenant Theology: most hold to the classic Reformed contrast between the Covenant of Works in Adam and the Covenant of Grace in Christ (the last Adam) - and the Elect in Him as His seed. This eternal Covenant of Grace is progressively revealed through the historic Biblical covenants.
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Local autonomy: each congregation is a fully independent church, which considers itself accountable directly to Jesus Christ rather than intermediately through an earthly organization such as a Convention, Synod or Presbytery.
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Plurality in Leadership: each local church has multiple Elders as well as one or more Pastors (also known as plurality of elders); often the terms are interchangeable or denote only a difference in full or partial-time dedication to the ministry. Often all leaders are called elders, with the pastor being considered only a primus inter pares.
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The reservation of the Elder role for men, and usually also that of Deacon.
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Moderate Cessationism: the supernatural Gifts of the Holy Ghost in general, and Revivals specifically, are considered exceptional measures sovereignly bestowed by God, not to be searched as a common policy. Thus a rejection of man-generated Revivalism in general and Pentecostalism specifically.
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The idea of the Sunday as the Christian Sabbath (except for New Covenant Theologians).
Despite your contention, free will or Arminianism has never been a Baptist belief from its origins. This is a relatively new phenomena, say a few hundred years. Its most extreme view is in the free will Baptist churches. It is only moderate in the SBC.
All of this gives further evidence against your other false premise that Baptists are Protestant. Baptists have no hierarchy. They are autonomous local churches. There is no uniformity of an up and down line of authority. All other Protestant denominations have a hierarchy. For example, there is no debate within Presbyterian circles about sovereignty, nor is there any debate in Methodist circles about free will. The very nature of the Baptist structure invites debate.
That is why this forum is here. Believe it or not, people can express differences of opinion without being arrogant, mean and self-centered.