I just wanted to add that dd has 2 friends (whom she met here at MDC) who nursed as long as or longer than her. And, when dd was 4-5, I met 2 women online who nursed their dc past 7yrs (they were a huge influence on my decision to trust dd's needs and my instincts). And I've met several wonderful women since then who have nursed as long, or nearly as long as (or longer than) us.
I just wanted to add that because I don't think they're around here anymore to add their votes.
eta: I see someone already added their vote as I was writing this post.