Hard to say, in general they do exclude paid traffic and only report "organic traffic' when they self-report numbers. However comScore is its own thing so I'm

Hard to say, in general they do exclude paid traffic and only report "organic traffic' when they self-report numbers. However comScore is its own thing so I'm unsure and would guess it includes paid-traffic. That said, typically I've found Omniture numbers higher than comScore and IMHO are a more accurate reflection... TLDR; I'd say the growth is genuine.