Mine was lost, too, but I still emailed them what I could remember. I didn't remember my exact post count, but I did remember the post-count title I had and the date of my original registration. My previous posts are lost, but, as you can see (look left), they still managed to put count, title, and registration date back at least close to what it was.
Your old posts will remain lost, not much they can do about that, but if you will email what you know/remember they can still update things like title, post count, and registration date.