I have nearly died a few times in my life, and I would heavily equate the sensations of ego-death/drug induced death sensations to it. There are some big differences, the main one is your tripping face.
In my NDE's[not drug induced] I found similar notions of I am energy/"god-head", you feel seperated from the seperations and one with it all, or atleast I've felt like I was transitioning to there. Time does slow down just like on drug induced ego-death/NDE.
I believe the drug's make you convince you that you are dieing, triggering some kind of response from your pineal gland or wherever adrenaline is produced. Which starts some kind of rebirth cycle of your energy. I don't want to get into egyptian religion here as it is off topic but read the egyptian book of the dead(I haven't read the whole thing but the beliefs are very... note-worthy)!
The similarities are simply put. When your about to die your world is SHATTERING, your ego MUST die, because the realization that you are dieing is occurring, and you feel menial as your true physical nature is/was. When your on an intense trip the same goes.
I have no experience with dmt, but I have had intense ego-death from high doses of other entheogens. I hear though that DMT is just instant ego-death covered in fractal mantras though.
Awesome post though beautifully written with beautiful sentaments. Next time your out there in the matrix of life, try to remember Mydriasis said "hi", some friends may visit you!