"Thin" could mean a couple of things here. One possibility is that certain frequencies, most likely in the midrange and/or upper midbase, are being suppressed. Or, the highs and lows are being accentuated, if you prefer. Another possibility is that the cable is accurately conveying the "thin-ness" of the recording, whereas most other cables are adding distortion that is perceived as "full-ness". Given the general excellence of Shunyata cables, I suspect its the latter.