I'd certainly be nervous about that cable and ask for their high speed certificate (they should have one). Since we all know that the maximum length of a certified high speed cable is approximately 25 feet (5 feet is not within the "slop"), it would be difficult for them to have a 30 foot High Speed cable. However, if they do that means they have certified it at a laboratory and therefore should have a certificate.
Also this phrase, "Transfer Digital Audio and Video signals at warp speed of 10.2 Gigabits per second," is a warning sign. The only way to get to 10.2 gpbs is to use the maximum bandwidth available on the cable. If you are running at 1080p/60 then you would have a bitrate of 2.78 Gbps. If you enabled deep color then you would have 12 bits per pel instead of 8 bits, so your bitrate would be 4.17 Gbps. Now that's just video, so audio and other data goes across the HDMI cable as well. But, the point of all this is that the content (and chipset) chooses the bitrate and not the cable. So to imply that because you have this cable, you can transfer at 10.2 Gbps is, at best, misleading.
You can think of the cable as a water pipe. Just because you make the pipe bigger doesn't mean more water will flow - the water source would also have to increase the overall water rate.
In the end, I suspect if you used a known good HDMI cable, you would not have had the problems you had and who knows what pins were actually connected with the cable you used.Edited by alk3997 - 12/6/12 at 7:13am