Wikipedia
The Grace Movement (Hyper-dispensationalism, Mid-Acts Dispensationalism, ultra-dispensationalism, or more rarely, "Bullingerism" to which 'ultra-dispensationalism' properly applies) is a Protestant doctrine that basically views the teachings of the Apostle Paul both as unique from earlier apostles and as foundational for the church, a perspective sometimes characterized by proponents as the "Pauline Distinctive."
Mainstream dispensationalists such as Scofield and Ironside identify Pentecost, in the second chapter of Acts, with the start of the Church as distinct from Israel; mainstream dispensationalism may be referred to as the "Acts 2" position. Grace Movement Dispensationalists believe that the church started after Acts 2, emphasizing primarily the ministry of Paul. Hyper-dispensationalism exists in different intensities, with E. W. Bullinger (1837–1913), an Anglican clergyman and scholar, being the best known early expositor of Acts 28 ultra-dispensationalism, although all dispensational ideas trace back further to John Nelson Darby (1800–1882). J.C. O'Hair independently arrived at the Mid-Acts position after rejecting the Acts 2 position early on and then the Acts 28 position later.
A proponent of hyper-dispensationalism would be Charles F. Baker.
Opponents of hyper-dispensationalism would be Traditional Dispensationalists like John Walvoord and Charles Ryrie.
Within the United States, some advocates of hyper-dispensationalism refer to themselves as members of the "Grace Movement," and reject the prefix "hyper" or "ultra" as pejorative (often considering it derogatory or misinforming). Many affiliate with the Grace Gospel Fellowship, a church association, and its Grace Bible College, or the more conservative Berean Bible Fellowship.
Examination and refutation of the Acts 28 ultra-dispensational position by opponents of it (especially insofar as it concurs with ultra-dispensationalism) include Systematic Theology by Norman L. Geisler (cp. 2), and Wrongly Dividing the Word of Truth, by Harry A. Ironside Some opponents of hyper-dispensationalism refer to it as a "consistent Dispensationalism." Unfortunately, there has not been any informed substantial interaction with the Mid-Acts Hyper-dispensationalism in any contemporary published work.