Well, I've been here eleven years, and I think it's helped me considerably. I have stayed up to date on Perl and technology that relates to it, learned a great deal, and even helped a few people along the way.
I'm a little puzzled as to how you think this site might be a 'wast' (sic) of time after being here less than three weeks.
If you're serious about learning Perl, read a lot, try a few things on your own, read the documentation, read some articles, participate in the Chatterbox, maybe IRC, attend a local Perlmongers meeting, and see how you get along with the language and the community. It might really work for you (it did for me), or it might not be a good fit. It's your time, and only you can make up your own mind on Perl.
Alex / talexb / Toronto
"Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds