Since I said I'd keep you posted, I suppose I should post something. After three days, I abandoned my Soylent experiment. Probably as a consequence of the odd texture and the taste, I was having my Soylent lunch at the office when I had a sudden epiphany that "I just can't do this." I haven't had any since.I also had, um, bowel issues with it. My body is a lot happier with "normal" food in that department.
Anyway, I may yet try it again when they release version 1.5, and I still have four packets of Soylent 1.4 at home for emergencies (e.g., earthquakes). But for now, I'm done.