Did you know that neurotypical folks just can not think about anything for a period of time? Yeah, me neither.

#Autism and #ADHD lead to less synaptic pruning which results in a higher density of synaptic connections. This leads to brain hyperconnectivity, which is the cause of sensory overload and reduced filtering of irrelevant stimuli. It is as well a reason for difficulties with executive functions.

I wish I sometimes just could NOT think.

@jascha
Given what many people have said in the comments already, what I suspect is happening is that NTs are just not as introspective as NDs often are, and therefor are less aware of what their thoughts are, thus mistaking some slightly altered states of consciousness as "not thinking". Just a hypothesis though.