I would agree you have to separate the electric shifting issues from the IGH hub and belt. My touring bike has a Rohloff with a drop bar CoMotion shifter. I've never had any trouble quickly shifting multiple gears when there was a sudden change in pitch. If I have a hilly ride and I'm not using an e-bike it's the one I take because of the gearing. My wrist will get very tired of shifting on a century. I've never tried an electric shift version of the Rohloff but I can imagine it is much slower to shift than either a manual shift or a deraillieur with Di2/SRAM. Another issue is some riders don't seem to anticipate their gear changes.Responded there, but as a quick summary here: issue mentioned there is not caused by IGH or belt drive, it is more a complain about slow gears switching on R&M with electronic shifter for Rohloff. And I can personally confirm, that is is slow after test riding Homage earlier this year.