That might be, but empirically I've seen posts that I've made take
hours to get there, and I've seen posts that were made to the mailing
list (and copied to me directly) take hours to get there. In both
cases, there is an "upwards" propagation delay towards whatever hosts
Google is milking before stanford.edu or the others will see it...
Well, compare just in this thread how stuff got to me
(I broke paths with '\\' for clarity and removed return addresses):
===============================
Path: news.alt.net!news.maxwell.syr.edu!newsfeed.stanford.edu!postnews1.google.com!not-for-mail
From: (=?ISO-8859-1?Q?Hannu_Kankaanp=E4=E4?=)
Newsgroups: comp.lang.python
Path: news.alt.net!news.maxwell.syr.edu!feed2.news.rcn.net!rcn!nntp.abs.net\
!uunet!dca.uu.net!ash.uu.net!news.baymountain.com!not-for-mail
From: Paul McNett
Newsgroups: comp.lang.python
From: Peter Hansen
Newsgroups: comp.lang.python
Path: news.alt.net!priapus.visi.com!news-out.visi.com!hermes.visi.com\
!feed2.news.rcn.net!rcn!elnk-atl-nf1!newsfeed.earthlink.net!prodigy.com\
!rip!c03.atl99!cyclone2.usenetserver.com!newsfeeds-atl1!news.webusenet.com\
!newsfeed.on.tac.net!news.sentex.net!not-for-mail
Path: news.alt.net!priapus.visi.com!news-out.visi.com!petbe.visi.com\
!newspeer.monmouth.com!news-peer-east1.sprintlink.net!news.sprintlink.net\
!newsfeed!panix!panix3.panix.com!not-for-mail
From: (Aahz)
Newsgroups: comp.lang.python
From: Peter Hansen
Newsgroups: comp.lang.python
Path: news.alt.net!news.maxwell.syr.edu!newsfeed-east.nntpserver.com\
!nntpserver.com!chi1.webusenet.com!c03.atl99!cyclone2.usenetserver.com\
!newsfeeds-atl1!news.webusenet.com!newsfeed.on.tac.net!news.sentex.net!not-for-mail
===============================
Note that path from Peter was not the same both times.
Then, looking at one of my own posts in another thread:
Path: news.alt.net!oz.net!usenet
From: (Bengt Richter)
Newsgroups: comp.lang.python
Regards,
Bengt Richter