Im not sure abput this but isn't dp/dr and anxiety tied in with the flight or fight response which is related to ardrenline? Cos for an example if someone started chasing you with a gun with the intention to kill you your body and you mind would react to that situtaion an I spose you could experince a detachment from reality in the sense that instead of going about your normal everyday exsitence you sole concern would become to run away from the gunman (obviously to escape and to preserve your life) rather than I must get fom point A to B being a primary concern, So maybe dp is a similiar detachment that a body 'feels' wherver correctly or not that the person who is the body is in danger from something in reality maybe some situation that a person is put in such as abusive parents or a drug induced state and the mind experinces a detachment from how they previously viewed the world and this previous view and safety and securtiy of self is replaced with a repeater ferling in an individual's mind that they do not exsist or other anxiety thought patterns, I know for me personelly that my anxiety and later on dp and dr was baught on by me coming home stoned and then i kept imagining that an imaginery bogeyman was in my room with me and would pop out from under my bed and shock me, I of couse still having the mental processing of reason knew there was no bogeyman under my bed or in my room, it was mostly a result of a what if question that kept on repeating in my mind, and this probably resulted in a state of flight or fight and then this could have lead to anxiety or dp/dr states as my rational mind tries to disasscictae from my bogeyman type thoughts and this leads to mental confusion , hence anxiety.
But I don't know really, im just writing all this stuff as I stream of couciuness probably sounds like a load of babble but I do think that dp/dr states are related to flight and fight and adrenline like the article suggests, cos maybe the minds processers kind of slow down and prepare the body to fight or run ,(the lion examople is a good one). Maybe this suggests that time is just subjective based on the experience , cos I mean sometimes time seems to run fast when your enjoying your self , but go slow when your not etc etc.
Anyway interesting article , got me waffling on about a load of random crap anyway!