Speaker wire under the rug...

[Lesterbest]

Hmmm. Nordost Valhalla has 10.9 pF per foot. Try again!

A very pricey choice for most. There's generally an exception to everything.

 

[E-Stat]

A very pricey choice for most. There's generally an exception to everything.

Which is why I find sweeping generalizations like yours of any value. Flat cable design has little to do with capacitance.

Perhaps you're thinking of companies like Goertz who trade off high values of C for lower L in their designs.