I was the OP of that thread. The last time we were there we asked for the sauces. Our DS7 (has unusual tasts for a 7yr old) loves the sauces and we even bought a bottle of his favorite flavor to take home on an earlier visit. However the last time we were there they didn't have them.
The CM stated that the supplier could not keep up with demand and so the stopped serving the 4 sauces.
Now that has been a little over a year ago, and maybe they have secured the sauces again. We will find out in a few weeks. I'll let you know.