The abandoned cart notices still appear in the workflow timeline and have not been removed.
You can test for sure by going to your client's website, and adding items to your cart. You will then have to create an account and login, but do not checkout. Once you are logged in with items in your cart, and if you have not checked out yet, a New Abandoned Cart should appear in the workflow timeline.
Please let me know if you are still not able to make a test abandoned cart appear!