It originated from modern evangelicalism/easy believism.
I believe I alraedy gave you my churches, as well as other Reformed church stand on OSAS.
I accept your explanation and see that perhaps a different vocabulary makes sense. The more orthodox, for want of a better adjective, Protestants could be called genuine historical Protestants, while the more modern denominations could be called something else (Modern, Neo, Other, ?). I'm not sure how we would define those historical Protestants who have somewhat apostasized, although that may be too harsh a term (Anglicans, Episcopalians, Lutherans, and Presbyterians who now accept ordination of women, contraception, abortion, homosexual marriage, and other departures from their denominations' original creeds.)