I actually prefer arrival at "bus gate" than the jet bridge. Far less walk when arrive at bus gate.

If your time is tight, try grab a buggy if there is one around. We would miss our connection last time - Luckily a fellow passenger who knew what he was doing, kept looking around for a passing buggy and grabbed it. We hopped on for the ride. When all was said and done by the time we arrived our departure date to SYD at the farthest end of the departure hall, we were the last passengers to report for the flight. But because the departure was at bus gate and the bus for business class passengers wasn't ready yet, so we were able to sit down for a few minutes to catch our breadth. And that was a 1:10 hr connection time with on time arrival from ZAG. Original connection time was 45 min before schedule changes. Frankly I dont see how we could make it if arrive at jet bridge.