Compared to the Highwind and the SNES airships? Hell yeah, it's probably the second slowest in the main series.

jump to the 12:30 mark


VS.

jump to the 8:00 mark


As you can see, while both are fairly slow, the Hilde Garde 3 has a bit more pickup and go in comparison. The Ragnarok feels box-y and slow when watching both side by side, I almost feel like you're moving the map rather than the airship in VIII. Whereas IX's ship feels more mobile and zips through the scenery a bit better.