I have tested our connection and get about 960Mbs up and down.
Howerver the computer you use to test has a lot to do with it.
I have some dual cores that will only test at about 450 - 540 Mbs.
I use an i7-4770 to get the max speed.
I also have an old pentium laptop that I use to configure stuff and it will only do about 300 Mbs.
Hope this helps,
John