Instead of "ego" maybe "self" would cover the same kinda ground then, Issy. It's what I mean when using the term "ego death" - losing any sense of self or of being an individual being seperate from others. Experiencing without analysing. That kinda thing. The thread I linked up there had a good definition of "ego death" from f&b that most folks seemed able to agree on and would be my interpretation of it anyway
I think peaking on acid you experience loss of self in certain ways but in others you don't. Even when we're peaking on acid if a stranger came up to you and said "We're all one, now give me your credit card and pin number" you would still have enough sense of self to tell him to fuck off.
What that tells you about the sense of self I don't know.