This is misleading at best...
>From email@example.com Fri Oct 20 15:19:42 1995
>From: Sean Doran <firstname.lastname@example.org>
>To: email@example.com, firstname.lastname@example.org
>Subject: Re: Asymmetric Routing
>Date: Fri, 20 Oct 1995 14:22:35 -0400
>> Analysis of some of our routes shows the potential for asymmetric
>> routing...that is...the transmit path will be different than the return path
>> for packets.
>Asymmetry has been a reality for quite some time now; in fact
>it was happening during the NSFNET backbone service days,
>since the information in the PRDB was often in a shambles.
Not surprisingly, the PRDB was as good as the information
which was submitted by customers of the NSFNET BNS, though
there was a lot of checking done to try to proactively catch
mistakes. As someone who was working with/supporting the
NSFNET configuration process, I do not know of other customers
claiming that "the PRDB was often in a shambles" via phone, email,
or third-party reports.
Steve Richardson, Merit