[slg]

Soylent might think otherwise, but it still seems to be exclusive to the the Silicon Valley/tech sphere. There is a reason this is posted here and we don't see customer surveys about Ensure, Slimfast, Muscle Milk, or whatever similar product you want to compare. I would guess that is the biggest contributing factor to the heavy male split.

EDIT: I dug into the raw data and my original assumption seems to be supported with the age distributions as well. 23% of respondents were younger than 25, 70% were younger than 35, and 88% younger than 45. So the demographics for Soylent are young men with the largest chunk in their 20s.