Now that I could be bothered here is the exact email SE sent me, so I would be careful about talking about using Utorrent on here:

Thank you for contacting the Square Enix Support Centre.

We understand that the download of the new Final Fantasy XIV update is very slow and that you would like to use a 3rd party application to increase the download speeds.

Unfortunately, we have to affirm that a use of a 3rd party application or rather a torrent appication is prohibited and that a use of it will bring an account suspension if it is found out.

Best regards,

The SQUARE ENIX Support Centre Team
Thank you again for contacting us and for your interest in Square Enix products!
More help and information are available at the Square Enix Support Centre website.
http://support.eu.square-enix.com/