A Canadian view of Catholic issues and THE PERSONAL ORDINARIATE OF THE CHAIR OF ST PETER in North America
It's definitely true with the Anglo-Lutherans(see http://en.wikipedia.org/wiki/Anglo-Lutheran_Catholic_Church#Petition_for_unity_with_the_Holy_See ). However, it is my understanding that Anglicanorum Coetibus is only for traditions that have a concept of apostolic succession, an understanding that Tradition is important and a belief in the real presence. So while it may be possible that the Methodist might apply to Anglicanorum Coetibus, I don't think Baptists would have a chance. But given that individual Baptist preachers (even married Baptist preachers) have been accepted into the priesthood, at least this much is possible for all those who would not be eligible for Anglicanorum Coetibus.
Clearly any and all coming into communion with the Catholic Church through the Ordinariates or otherwise will be catechized and must accept the Catholic Faith as set forth in the Catechism of the Catholic Church. On matters of faith and morals all must do the same thing regardless of background or previous allegiance. So, anyone coming from the Baptist, Pentecostal or any other Protestant group is welcome to enter the Church under the provisions of Anglicanorum Coetibus through the Ordinariates provided the person can, like all others, affirm the Catholic Faith. In matters of liturgy, music and aesthetics there are broad parameters as evidenced by the approved Anglican Use Mass as well as the Eastern Catholic rites.