Good read this. 

Turns out traditional team brain-storming does not work.

 Well that is half correct in fact. 

The best approach is a mixture: we need time alone AND we need the group approach. If you only go for the group approach you get over-load and poor results. 

Turns out our brains our fickle engines at best and neuro-scientists advocate a new approach. 

Well three in on below.