Robson mentions a couple meta-analyses which only found that the symptoms couldn't be explained by gluten alone. He provides a biased but reasonable interpretation. But there is no account of a group dinner with folks rushing to the bathroom "within minutes". You've way overdone the dramatization so I was confused lol.

DOI: 10.1016/j.cgh.2016.08.007

DOI: 10.3389/fphys.2017.00621