If it were done using Bitcoin it would have taken ~60 minutes and cost ~$0.3977 at today's TX fee values: https://bitcoinfees.21.co/

This is interesting perspective for the settlements vs micro TX debate: Do we want a low security high performance network? or, a low level, high security, high value network?

This is the response by Deutsche Bundesbank when I asked about this gold reserve transfer:

http://imgur.com/8fmSToR