In the first edition, Grudem answered that question no. In the new edition, he does not clearly answer it. He concludes, “Some kind of ‘compromise’ position on baptism is not very likely to be adopted by denominational groups in the future.” That’s probably true.
John Piper hasresponded to Grudem regarding his shift on baptism.
Do check these thoughts out. I find this a very interesting discussion as the church that I work for is a union between the Baptist Union and the United Reformed Church. It uses both forms of baptism and has a fairly open membership policy.