Internet Traffic Down in Sweden; Piracy Law to Blame?

I'm not sure if I shared this information, but I am currently teaching a music business course at Tufts University. It's been challenging to balance it with my full-time "lawyer" job, but my students make it completely worth it. They're insightful and innovative, and many of them go above and beyond the call of duty. For example, one of my best students just sent me this article, citing that internet traffic is down an amazing 33% since the passage Sweden's IPRED law, which permits copyright holders to force ISPs into giving them lists of computers that have shared their material (illegally) online. I found it especially interesting that the comments in the article suggest that the drop in traffic is temporary while people figure how to get around it. Doesn't that just prove that suing users is a lost cause? Or is this an effective way of stopping piracy? (I personally think the former, but I welcome a debate!)