The perldoc website. I keep this permanently open in my browser, and refer to it regularly. I particularly like the convenience of the “Search” feature.
The downloaded documentation (perldoc.tar.gz). I use the HTML version for browsing when the website is down or slow, and the PDF version for printed hardcopies, which make great bedtime reading. ;-)
So, yes, some of us, at least, do regularly turn to perldoc. It’s a great resource, and, for me, one which has become almost indispensable. (And, while I’m at it, I should highlight the perldoc FAQs and Tutorials, valuable resources which are all-too-easy to overlook in the heat of programming.)