wigglerthefish :
I should mention that not all cables are created equal. What resolution are you attempting? Not all cables can support 1080p (correct me if I'm wrong).
You are right in saying not all cables are created equal, some are poor quality, others are incredibly high quality.
95% within the 1 - 3m length range will support full 1080p, the poor quality ones may not be able to support the data throughput required for 1080p and thus relegate to 1080i.
Past 5m or so, the quality of the cable really comes into play as signal degradation becomes a larger factor.