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This is a comment on arXiv:physics/0608292, subsequently published in PhysRev Lett, 98, 014501 (2007), in which Willis and Kerswell study in directnumerical simulations the statistics of turbulent lifetimes in pipe flow. Theysuggest that their data for six different Reynolds numbers support a divergenceof the lifetime near a Reynolds number of about 1870. However, their conclusionis not compelling: a re-analysis of their data shows that it is also compatiblewith an exponentially increasing lifetime.

Comment on 'Critical behaviour in the relaminarization of localized turbulence in pipe flow'