I know this is mostly a why does it really matter type question, but how long do you think the trip to Sharlyean took from Limsa? As the last time we traveled by what I'm going to assume was also a 5 mast late 18th century Galleon; that had a secret modern-ish engine in its haul we were told going from Limsa to Kugane would take 2-3 months. Now Sharlyean is a whole lot closer so I doubt it would take months to reach it. I also find it hard to think that we waited a long period for the special adamantite to arrive as the ones that traveled by sea arrived on the same day as those that were flown in via the Prima Vista.

The only odd thing about said travel is I'm fairly certain the twins in all three ARR openings are shown to be fairly dazed and confused if not actually asleep.