If I may, I will throw another twist into the discussion.
I prefer to bottom post. I like the information to be in chronological
discussion order.
Having said that, if you look at some of my postings you will find they
are top posted. Why? Because when I post from my personal account via
my ISP's web based interface, it quote the original message with a
simple divider line at the top of the quote. I would have to type a
bunch of extra stuff to distingish my reply from the original if I were
to bottom post since the quoted message has no quote indicators (">") to
the left of it's text. So, I top post when using that interface because
I am too lazy to type quote indicators or other separating marks.
(My complaints/suggestions to the ISP have gone ignored or un-implemented.)
Other than that, I live with what gets posted because LTS (Life's Too
Short) to worry about such a small thing.