Hmm that's strange i often thought the priority is very relaxed. When ever i am departing Amsterdam people just line up in the priority lane even though they obviously have no status...(As the line is the same length as the normal ones). So i just decided to line up in the normal line as there was no difference.

This I am mentioning is a non Schengen flight on CI to Bangkok -Taipei. Also i know for a fact that they only issue me with 1 priority for Bangkok when flying in and out and they wont allow one extra person with me.