I actually did know that, as is evidenced by the fact that I knew without looking at documentation that the right correction to what you wrote is s/latter/former/. :-)

(ie &foo shares @_, foo(@_) does not.)

Those who didn't know this should check out perlsub, or if you don't want to think carefully about consequences, the excellent summary at (tye)Re: A question of style. (Hrm, glancing at it a current version of perlsub gets it right twice, but the comment in the code sample is misleading.)