Resource update - Legal vs. P2P

Interesting graphic in this press release from NPD Group (http://www.npd.com/dynamic/releases/press_041013.html), which shows that P2P and legal music download user numbers have moved pretty much in tandem so far, at least until May/June, since when P2P has seen a growth spurt and legal services appear to have stagnated. NPD says this relates to the end of promotional offers from legal sites during that time frame. This seems to seriously call into question the assumption that legal services constitute some sort of magic bullet to overcome P2P.