Not at all the same feature as what we had. Again, the old behavior listed out each thread that you've posted in, and ordered them by date of the most recent post in the thread. The benefit is that you don't have to be subscribed to a thread, but you can check in from time to time to see if it has been updated. It was really valuable. To me anyways.

Also, My Posts does NOT list out every post you've ever made. For me it only goes back 1000 posts.