> An engineer with 8 1-hour blocks is near useless. 

> An engineer with 1 8-hour block is an ultra-productive force of nature. 

> Coding is a momentum based activity. Similar to athletes, developers can get in the zone, but they need focus.

source : Alex Chiou on linkedIn

 

Tom DeMarco wrote this up literally millions of years ago in his book 'Peopleware',  and yet it is still unheard. The conclusion follows that the industry is not about people.