Techlink is an established cable company that makes some decent stuff. We've reviewed the Wires XS MI cable from them (as a 2m HDMI) and thought it a little overpriced (at £60), with rivals like the QED HDMI-P offering better details and black-levels for the money. Maybe the cable you have is the 1m version of that? (In which case it's a bargain if free!)
We've just tested another Techlink HDMI cable we loved for the money, however - but as i'm not in the office, I don't know the exact details on that, i'm afraid.
I'd relax and enjoy your superb set and only worry about a cable upgrade at a later date.
That new Techlink I mentioned is tested as part of a big round-up of the latest HDMI cables in our February issue (out January 10th), where we've also got a subscription offer of a free Award-winning Chord HDMI lead, worth £83....