Is EPIC afraid of every competition?!?!!? It seems like it to me. EVERY. FREAKING. TIME. SINCE. SELENA. BEAT. HER. IN. EVERY. POSSIBLE. WAY. SHE. COULD.
They are probably hoping RNR becomes an actual hit. (Duh)
Releasing in September would only give RNR about a month to gain momentum and get people interested in the album. It wouldn't be enough time. Avril hasn't done anything noteworthy chart-wise since Girlfriend so...I'd say the delay was a smart move.
They should really step up the promo while they have the chance. They have a great shot at holiday sales now. Hopefully her label doesn't mess this up for her.