I hope it's true, since it's a major reason I'm here, but I can't confirm it (yet). I enjoy helping people here, and I certainly learn a lot, but my main reason for checking in every day and posting hundreds of times is to build up a corpus of evidence that I have a clue. As someone whose Perl work has mostly been behind-the-scenes sysadmin and quick-hack stuff and CGIs that have long since been replaced, I don't have a list of CPAN modules or much public stuff to promote myself. I intend to change that, but in the meantime, I figure I can point to my writeups here and the votes they've gotten as evidence that I know what I'm doing.
However, I haven't done that yet, because I haven't yet revamped my own web site to act as a Perl portfolio and point here as one of my references. So I can't really say whether it would help if I took more advantage of it. I can say that no one's ever contacted me here to hire me, but I get the impression that everyone who comes here intends to do his own work (or get someone to provide the answer for free). So I don't think employers are very likely to just stumble over you here, because this isn't that kind of site.
It may be different for the guys at the very top of the food chain, but that's my experience at level 11. And if any of that sounds like a complaint, I don't mean it that way. This is my favorite Perl site, bar none, and I learn enough here to make it worth participating even if it never generates a dollar of paid work.
Available for small or large Perl jobs; see my home node.