I believe that this has been your experience - I can only offer my own as another data point. I've done the "two competing offers" thing four or five times at

I believe that this has been your experience - I can only offer my own as another data point. I've done the "two competing offers" thing four or five times at companies big and small. I've never had a company rescind an offer or ghost. In fact they all seem to expect a competing offer; all have asked "Are you interviewing anywhere else?" at some point. I agree with discussing a minimum early on in the interview process. It's a good smoke test to ensure neither party's time is being wasted.