Never. Lightspeed time delay between nodes is too great. More accurately, maximum data transmission speed is lightspeed/refractive index in fiberoptic and lightspeed/sqrt(dielectric constant) in cable. Brains are compact and 3-D.

A light millisecond with refractive index 1.3 (or dielectric constant 2.7) is 143 miles. The Net is essentially 2-D and spread out over at least the area of the US. Too slow. Mind is cnfined to local resources.

How long did brains require to evolve the necessary wetware for intelligence?

Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz3.pdf