In that article, brian d foy is saying that using & sometimes avoids trouble for people who are very new to Perl. What the rest of us are saying is that using & causes more trouble for intermediate-level Perl programmers. Decide for yourself which category you are in, but remember that & is old-perl.

Mr foy suggests that it is ok to type "&foo;", but never do that, because it actually passes @_ to foo. Always put the parens. "foo();" or "&foo();", but not "&foo;" unless you really mean it.