Yes I think all that IAN-UK meant was that, if you're going to take percentages, there's a difference between:
- Percentage of passengers that have [XX] status
- Percentage of discrete passengers that have [XX] status.

By their very nature, PAX with status will take a lot of flights, so taking TabTraveller's example would suggest that a certain percentage of PAX on each plane would have Gold Cards. However, if you took a list of all the passenger names that have passed through T5 in a year, it'd be a much lower percentage with shiny cards.