Theres no twist what so ever, what you see is what you get. The cables inside the sheath are absurdly loose.
If I grabbed 1 wire I could easily pull it through with no problem!http://img404.imageshack.us/img404/115/cablec.png
Yes thats what it says on the side of the cable ....http://img687.imageshack.us/img687/2719/wp000647.jpg
I bet it was absurdly cheap too. I would not use that as an Ethernet cable, that is definitely phone cable given the lack of twist and color scheme. An Ethernet cable looks like this when you pull the sheath back, and is generally tightly woven.
It has to be low quality since I can get a 305m roll of this stuff for ~£25. The answer to your original question OP is no in my professional opinion. I would not use that cable and expect to be incident free as far as transmission loss, transmit errors, packet loss, and throughput.
Edit: Additionally, the biggest tell-tale sign is that the strands of cable are aluminium, which is an absolute no; all proper Cat5E or Cat6 cable has copper strands. If you look along the sheath you should also see "ETL Verified to EIA/TIA-568-B-2-1" or something similar, as well as a ratings frequency (350Mhz for Cat5, 550Mhz (generally) for Cat5E or Cat6.