Since we are talking about audio then IEC60958 is the applicable standard. From what I gathered the rise times are so long the signal looks like a triangle wave or a sine wave. This is where the initial concern for jitter comes from. The current Cirrus Logic chip has a PLL in it's clock recovery circuit. I don't think this is an issue anymore.
On the other hand empirical testing has shown a clothes hanger worked fine. This standard is aimed at consumers and as such must work with junk. If it didn't then the non-audiophile folks would notice a problem.
For the twisted pair interconnects I can't see a significant advantage except for possible shielding. Without a diff input a twisted pair itself won't buy much. If the shield is grounded at the source then I can understand why it would work better in the car. I noticed that the Outlaw cable are twisted pair