On 30 Dec 2015, at 08:19, Toralf Förster <toralf.foerster@gmx.de> wrote:

Signed PGP part

On 12/29/2015 12:53 PM, Tim Wilson-Brown - teor wrote:
>
> I don't know of any other attack or request that amplifies outbound
> traffic via tor or otherwise, but there may be some.

I did experienced too a gap of incoming versus outgoing of about 30% and more few times in the past at an exit relay, having an advertised bandwidth of 8 MB/sec. That gap persists over a day or so and then vanished.