A recent paper of Jerzy K-G has this footnote on page 7, at the conclusion: "3. Beware! These answers reflect my personal understanding and views, and may not be shared by other experts!" I have the impression that K-G's view of DSR (that it is non-dispersive and does not predict energy dependence of the speed of light) may be gaining adherents. I think I remember seeing something about this in a paper co-authored with Freidel. Kowalski-Glikman has been saying this for several years at least. I saw the view in a paper of his from several years back. Here is what he says in the conclusions of this recent paper, on page 7: Are there any deviations from Special Relativity predicted by DSR, which can be observed in experiments in a foreseeable future? The field theory presented above strongly suggest that there should be no such ob- servable effects in cosmic rays (the predictions of DSR for both GLAST and Pierre Auger signals seem to be effectively zero.) But there might be inter- esting deviations for large quantum systems of energies close to the Planck one, see  for the concrete proposal. and the reference is to this paper:  J. Magueijo, “Could quantum gravity be tested with high intensity lasers?,” Phys. Rev. D 73 (2006) 124020 [arXiv:gr-qc/0603073]. Here is the K-G paper: http://arxiv.org/abs/hep-th/0612280 Doubly Special Relativity at the age of six Jerzy Kowalski-Glikman To appear in the Proceedings of 22nd Max Born Symposium "The current status of Doubly Special Relativity research program is shortly presented. I dedicate this paper to my teacher and friend Professor Jerzy Lukierski on occasion of his seventieth birthday."