that's the part that irks me the most all of Middy brood keep saying time runs differently for dragons then humans. Yet middy himself literally says to Tiamat:
It hath been five thousand years, my child. Wilt thou not forgive thyself?
So he implies that even for a dragon it has been a while now and that its time to forgive herself.
Maybe middy is better able to relate to the short human time span but it was weird reading that even back then.