[Cryptography] Why prefer symmetric crypto over public key crypto?

[Perry E. Metzger]

On Sat, 7 Sep 2013 13:06:14 -0700
Tony Arcieri <bascule at gmail.com> wrote:
> In order to beat quantum computers, we need to use public key systems
> with no (known) quantum attacks, such as lattice-based (NTRU) or
> code-based (McEliece/McBits) algorithms. ECC and RSA will no longer
> be useful.

I'm unaware of an ECC equivalent of the Shor algorithm. Could you
enlighten me on that?

Perry