The significance of word placement

[Boris 'pi' Piwinger]

Hi!

Most of the spam not caught by bogofilter for me is in
German. A significant portion of that is "women" asking for
"dates". Strange enough the subject is "Betreff" (which
means: subject or topic). So this is a 100 percenter in my
filter. Bogofilter often misses it, though.

Would it be significant if a word shows up in the header or
even the subject, bogofilter would know better. I have
virtually hundreds of those messages with that exact
subject. None of which is ham.

pi