I was on a HNK-BKK flight this week & after clearing immigration I realised that I didn't have my wallet.
I went to the CX desk & explained that I had checked it during the flight & that it might be in my seat.
15 mins later a member of CX staff came & handed me my wallet.
It was an excellent flight with very attentive, hard working & charming crew.
Many many thanks.

Good to hear

But I'm sure you boarded the plane at Hong Kong (HKG) not Hinchinbrook Island.

That's a very nice story.

Good to hear some positive experiences from time to time ^

I was going to say " if that had been an iPad instead of a wallet, it would have disappeared" but then I remembered an associate of mine had flown this route in reverse (BKK-HKG) and had an iPad returned by CX in HKG. ^

There is still hope for humanity

How would you have reacted if they said they couldn't find it ?

This happened to me twice with my passport (once in BKK and once in MNL), and twice the Senior Purser caught me up with me just as I was about to reach the end of the airbridge/tube.

Yep been there, I was in F to Amsterdam and left a brand new Cannon camera with 2 extra lenses in the wardrobe, they managed to catch me walking out of baggage collection area.

Couple of experiences - one nonCX, but both at HKG.

1)Left my jacket, with some relatively important papers inside the pocket, at the Pier before a flight to SIN. Realized when on board, (and remembered that I had slung the jacket on the back of a chair in the PC area) a few minutes before doors close and told the ISM, who got the ground staff to call the Pier and check. No luck.
On landing at SIN, there was a groundpersonnel holding a placard with my name, and the message 'Your jacket's been found, it's on the next flight landing in a couple of hours, could we have your address and we'll get it sent across'.

2) AI flight DEL-HKG. Left my wallet and one of the phones in the seat pocket - was among the last to deplane (saw cleaning staff waiting in the aero-bridge). Realized just pre-immigration and approached (I think) one of the transfer desks for help. Was reunited with my belongings some 15mins later.

I wonder if it's any different if you fly on coach or on a premium cabin.

Hong Kong people are very good that way. Same thing happened to me, but in a Taxi. Hotel helped me track down the driver, got it back 2 hours later, driver would not take a reward.