daffie and carrotjuice, good thinking. Daffie I got slightly different data? So I think this was Dec 13 (yesterday), and the following is what I show (I'm guessing for the OP's inbound flight, but it seems close to his description of the situation):

Inbound flight
CX463. Flown by B-LAJ (33G)
Touchdown: 8:01am
Gate time: 8:15am
Gate #: 24

Outbound flight
CX759. Flown by B-LAG (33G)
Wheels up: 9:25am
Gate #: 68

Indeed, this is one of the longer walks out there. They got unlucky with the long taxi, CX463 landed south and then had to taxi around to the north gates. It appears there was more time (~15 mins) than the poster conceded, but it doesn't seem too far out there he/she deplaned around 8:25/8:30ish if they were seated in the back.

update: daffie, I see the 7:41am arrival being on the 14th in HKG (today still HK time), not the 13th.

Second update: I'm pretty sure the ground staff working CX759 would've been told the touch-down time (8:01am) not the gate time (8:15am). A 14 minute taxi in HK is long, especially at that hour, so it appears the OP just got unlucky there. The gate crew probably thought the plane parked a few minutes after 8:01am and thus you were dogging it. Realistically in the early mornings, you're looking at <10 minutes almost every time for the taxi like clockwork. Bad luck here.