Yea I don't understand how what seems to be a sincere (although strange) experience can annoy anyone. If anyone is stupid enough to base their entire concept of dosing parameters on one post, when they have this entire site, then perhaps they aren't at the right place in their lives to be experimenting. This is a public forum as well as a research website - conversation and experiences are supposed to be welcome. There's no need to insult the guy and call him a liar just because things don't add up.
My first thought was that you spilled some...
Anyway, chances are you didn't actually smoke 600mg, but to answer your question, tolerance is not a big issue for most users with DMT. It appears mostly non-existent. I'm confident you won't have any tolerance issues even if you did manage to somehow smoke 600mg in one night or even in one sitting.
For future reference posting, take Traveler's advice.