I have not yet been able to reach the 1TH/S. At first it showed 900-920GH/S but now as I checked it was hashing only at 820GH/S. Will post later as I check again.
woudl you like to change the pool or stick with the pool u choose
+- 5 % has been said by bitmain itself...rite now you shoudl be getting atleast 950 gh/s