These four groups may have been picked randomly. I think all 21 projects get feedback in all three aspects.

Here is some more information:

"Each project will be placed in a 'fishbowl' at three different tracks, focusing respectively on sustainability, technology use and social impact. There will be 5 consecutive panel sessions within each track. Each session will focus on 4-5 projects and involve three expert reviewers. The reviewer's job is to carefully examine each project's materials before NetSquared and then, at the session, subject the 4-5 projects to 3 minutes of 'tough love' -- which we define as meaningful questions and comments that do not shirk from talking about weaknesses (of course, if the reviewer doesn't see any weaknesses, s/he doesn't have to make them up in order to be 'tough'!)