I would encourage you to read the REST of the link I posted, as most of it is centered around addressing exactly what you have quoted. The very next paragraph:
“However, no elite sprinter was investigated in this study. It is possible that elite sprinters react faster than sub elite sprinters, so the lower limit of 100 ms may not be correct for use at international top matches. Furthermore, the response time in this study was not measured in a race situation, while athletes in a race situation may respond faster due to increased arousal and motivation. The question that arises is therefore whether it is possible to respond to the start signal within 100 ms.”
Eight participants in a study that was not peer reviewed does not constitute rigor. I would encourage you to dive into some of the references at the bottom of the post, or refer to the literature review that the University of Clemson maintains.