All much the same except for dizum. Dizum admin reported an
overloaded server a week or so back which will probably sort
itself out in time.
Unless a site is having problems with their mail server and the post
is not going through the remailer network, I'd say they are all
basically the same and should only take a matter of minutes to
process postings.
What about running some ping tests to alt.test and compare the
results from the different m2n gateways here?
Just for fun, I'll make a prediction; none will be over 30 minutes.