Well, most of the music I listen to... do not have glare in the treble, while I admit there is a handful of recordings that exhibit glare, which I openly welcome. After all, I find Thiel Coaxials to be transparent and truthful to the music. It doesn’t mask or mitigate any shortcomings in the recording or other components in the system.
I recall there are some people who prefer matching Thiel 2.7 & 3.7 with amps to tame the glare, or i’d like to describe, "shooting lasers at you! pew pew pew". I think one of the "best" matching amps in those days were Classe.
On the other hand, I do not recall Tellurium Q Ultra Silver having silver conductors or traces of it... but then again we will never know because Geoff (Boss of Tellurium Q) did not reveal what is inside his cables.