Tgrisham sez:
"With my Von Schweikert VR-4JRs, I use the Speltz anti-cables. I have tried twisted and untwisted and found the bass more defined and quicker using untwisted."
This would seem to jibe with the recommendation for twisting to achieve max bass response, but apparently with your speakers, in your room, the other is preferrable for your tastes. At least it's nice to have the choice. I still wonder about the guys who posted before who found the Anti-Cables too weak in the bass, but I believe the Speltz website makes this topic pretty clear.
Of course, using cables that roll off the treble as a reference (something I believe many 'garden hose' and/or networked cables do) will make a cable that doesn't do this sound less bassy by comparison. (And the opposite effect could possibly have something to do with why Tgrisham finds the extreme treble "more natural" with the cables untwisted, although that description doesn't tell us in what way the HF sounds less natural when the cables are twisted.)
I agree with Tgrisham and Tvad on the point about 'break-in' and dielectric; the use of the relatively sparse dielectric seems like it should be a mitigating -- not exacerbating -- factor in this area.