Yes, IT is fully aware, and they even set it up for me after I requested permission and pitched BitTorrent Sync's merits. My role has me working with anywhere from 20 to 60 external vendors at a time and transferring massive files that are stored on the network, and that's not something I could sneak by IT.
I also have an FTP, but only as a backup. In my role, I'm dealing with several gigs of transfers per day that need to be individually reviewed, and all of the files are coming from majorly offset time zones like China and India. The end of their day when they submit their work is roughly the beginning of mine, and vice versa. With an FTP, I have to manually trigger a download that may take all day to complete. If the files for review don't finish transferring until 5pm, my artists and I will be rushing to try to review the work before we go home and before my overseas teams get online. With BitTorrent Sync, the files are already synced by the time I get into work. That's 4 to 8 hours of time savings per day, which is hugely important to the schedules I'm working with.