No, glob can return . and .. and nothing in the documentation seems to promise otherwise (I searched glob, perlop, and File::Glob). However, glob("*") will not return any dot-files, including the directories, because it works similarly to shell wildcards. Here's an example of where it does, though:
$ perl -le'$,=" ";print glob(".*")'
. .. .bash_history .bash_profile # and so on
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