Can you quantify how you have knowledge that there were 50 Platinum members (I rarely bother taking note of others' status).
How do you know the only assistance provided was for First and CL Passengers?
How many is 'most of the 50 Platinum members' waiting in arrivals? Where were the rest of them, if no special arrangements had been made, and most were waiting in arrivals?
Sorry - I've read the above as a very subjective view that, in my mind, it doesn't paint a complete picture. I certainly wasn't there- and, from the above, the author was too busy being whisked off in chauffeured comfort to do a boarding pass inspection and a post-delay interview with most of the WP's, in order to accurately portray the situation.