Ship transfers should be instant. Any delay only benefits two groups: griefers who do not want to run the risk that their mark might be able to pull out a combat ship and people who can devote as many hours as possible to the game.
Further, at 100 minutes, it would be faster to run your main ship out, taxi back in a Stockwinder, then manually move the other ship. If that is the case, what possible function or mechanic does delayed transfer fill?
Instant transfer would also increase ship diversification. Rather than everyone having to run multi-role ships which have good range exclusively, they could fit out combat ships or tramp traders in addition to their main. These ships could be moved (and therefore used) much more easily, meaning you would see many more of them.
The idea that it shrinks the galaxy is patently absurd. You still have to be physically present. Not only that, but aren't they about to introduce a neutron-star hyperjump mechanic, along with the long rumored super jump drives? Those items "shrink" the universe much more significantly than being able to move ships after arriving. Cap the transfer range at 400ly and you can still use it pretty much anywhere inside the bubble, but still exclude places like the New Bubble or Sothis.
Finally, how do all of the people who are up-in-arms about the possibility of instant transfers explain respawning and ship insurance "in-universe?" Ship transfer is no different: a concession to reality in order to make the game more fun. There is a reason you don't have to fill out an in-game insurance claim and wait for them to build you a new ship and then go about collecting all new mats and remaking all of your engineer mods: it isn't fun. Using that same logic: if I want to play with a different ship, it should not require either 1) actual hours of tedious work moving multiple ships which could eat up all of my recreation time (I work frequently and also enjoy seeing my family, in addition to playing Elite), or 2) pay a significant sum of in-game credits in order to wait an arbitrary period of time, which translates to time spent not playing the game.
So just to conclude, inserting a delay into the transfer mechanic means that it will either reduce playtime or just never be used.
Also, I am very disappointed with how this poll is being handled. It is obvious that this caters to an incredibly small, but extremely vocal sub-group of the already small minority of players who visit these forums. If this poll were presented at log in or, better yet, if both options were offered in game to every single player, I think we would get a much more representative sample. The fact that this poll doesn't appear on the loader, hasn't been mentioned with a special email message, or been advertised in any way will skew the results heavily in favor of those with the most time to spend on the game and those who visit these forums. Wrapping this up in the guise of the "Players' Will" when you are only seeking the opinions of a minority of a minority of a pretty large player base is both dishonest and misleading.