Not really. It is usually based in some level of truth, but a good story teller can always work their way around it. The person isn't coming up with BS, but is converting "this is what we would have done" to "this is what we did".

The ability to answer such questions often comes down to how good of a storyteller someone is, rather than the actual value of their experiences. One of my close friends hate BS answers, and will never use tangential experiences to structure an appropriate answer to such questions.

I do not know the degree to which you go in depth with, but a couple of follow up questions is no biggie.