One of the students at Brown has written a clear piece that introduces the fragment and then explains Prof. Depuydt's involvement:
Divorcing Mrs. Jesus
. . . . . Professor Leo Depuydt sits in his barren office in the Egyptology Department building at Brown, proud to be playing the role of scholarly detective. Depuydt leaves no room for question. To him the answer is obvious: the fragment is a forgery. Upon reading the article in the Times, Depuydt cautioned The Harvard Theological Review: “I said literally [in an email to the HTR], ‘The danger of making a fool of oneself is real’.” Taking Depuydt’s comment to heart, The Harvard Theological Review solicited a counter-report from him. Within a matter of days, Depuydt had compiled an independently researched, comprehensive, 14-page report, denouncing any chance of authenticity. “There is no doubt in my mind whatsoever that the text … is a patchwork of words and phrases from the published and well-known Coptic Gospel of Thomas… It is therefore clear that the Text is not an independent literary composition at all,” Depuydt wrote in his report. King acknowledged the Gospel of Thomas, but only to the extent that it offers certain phrases similar to those in the ‘Gospel of Jesus’ Wife.’
In his report, Depuydt shows, blow by blow, that the vast majority of the text is directly taken from the Gospel of Thomas, and clumsily at that. So careless are the grammatical errors that Depuydt postulates, “An ancient native speaker of Coptic who can select and combine words and phrases from the Gospel of Thomas with any understanding could not possibly have produced said grammatical blunders.” Depuydt believes the author is a modern forger, possibly someone intending the controversial marital reference to be tongue-in-cheek. Nothing is known about the forger, but Depuydt suspects the forger may have come out of Germany: “We [Depuydt and a friend] are focusing on Germany and specifically Berlin because that is where the piece first turned up. But no success so far. The forger’s Coptic is not good. So it could be someone in the periphery of scholarship who never became a scholar.”The article is all worth reading, of course. I have just excerpted the pieces of greatest interest above. It concludes with the note that "Depuydt’s report is set to print in The Harvard Theological Review in January 2013, alongside King’s report and a rebuttal by King if the ink tests prove inconclusive."