Haha, I got the same call. They said they where just checking I got the email, as if they where surprised I didn't sign up. I told them I probably have more experience than their trainer so why would I want training?
Software like Altium and Solidworks (probably worse than AD in this regard) both seem to just be in a perpetual loop of bug fixes. They continually add new festures, and in the process break existing ones. Once you get to a stable version (or SW service pack) it does pay to resist clicking that upgrade button. Unless there is a compelling new feature or your a masochist and just need the lattest one. I do 'feel' like AD16 has been fairly good so far, its been a few months since I last seen the dreaded exception error.