JEDEC started writing DDR4 specs back in 2004 or so, which was the progression from the DDR3 specs they were writing. CLs continued up from the base DDR3 specs, i.e. believe they planned 2133 to be CL12, 1866 to be CL11 etc, and note 1866 basically got dumped from the DDR4 lineup as it was outdated. Rather than rewrite to what DRAM manufacturers have taken things to, they have stuck to their already ancient expectations. We've had DDR3 2133 at CL9 for a few years now, yet the DDR4 is 'to spec' at 12 and higher. Additionally I have to beg to differ, it's the manufacturers who have been basically setting standards for DDR3 going back to 1866. The companies (like GSkill) are designing and implementing higher data rate DRAM based on what they learn, the leaders are for all intents and purposes setting the standards for the lower end DRAM manufactures to follow as far as timings. Their R&D departments are already looking into tightening timings that vary from JEDEC spec for the performance people want. They 'planned' to have specs up through 3200, and yet there is already DDR4 3300, which barely is higher than available DDR3 rates