No, I am pretty sure she doesn't know what she is talking about. I would definitely call her on that. I was on Protein shakes for about 4-5 weeks and once I could get enough protein in the pureed or mushies stage, bye bye Protein Shakes.
I actually liked the Atkins Advantage chocolate Royale. Not bad, especially ice cold. That is about the only one I could handle...and I drank it rather quickly. Isopure was pure hell! I didn't mind the flavor, but the aftertaste in my mouth made me want to hork! LOL
Good luck and don't worry, you will get through this and you will never look at a liquid diet the same again!!!