Trabbi,
Thanks for your answer. It did enlighten me. Let me add though some details on the story. The airplane was late inbound to base and it still had to fly to two more destinations. I was on the first one. My thread started because I thought that by using the jet bridge, the time for the pax from my flight, from airplane to landside would be shorter than using a single bus for an A320 aircraft. With the added benefit of speeding the boarding for the flight to the second destination given there were a lot of empty jet-bridges.
Thanks again for your time.
Rwy in Sight