[ewst]

> As more people are added to a project, the complexity of communication increases exponentially.

Doesn't it increase by n^2? as per the picture with the graphs?

[supernewton]

Laypeople use "exponential" to mean "superlinear". It's fine, probably.

[dragonwriter]

Laypeople use “exponential” to mean “fast”, with what “fast" means varying by speaker and context.

[not2b]

Brooks wrote that it was quadratic, so that seems to be an error in the summary.