Actially, Ciaratara, it's more about speed once you have finished accelerating than the actual rate of acceleration.
 A typical airliner accelerates at roughly 0.4 G. That's about 4m/second squared. For comparison, at that rate your car would take about 7 seconds to reach highway speed (100 km/h) from a dead stop. To reach 1100 km/h would take about 77 seconds, or just over a minute. 
A Boeing 787 Dreamliner cruises at about 900 km/h. So even assuming a comparable acceleration, the Hyperloop would travel about 18% faster and also won't have all that taxiing around the airport to do, getting to or from the active runway. So you get from terminal to terminal sooner. I suspect the bigger selling point will be stations located closer to city centres, unlike most airports, this cutting down on travel time in local traffic.