Nick Jonas and Delta Goodrem Break Up

(Source: Scope)
Delta Goodrem and her toyboy boyfriend, Nick Jonas, have ended their romance! Here's the statement:
"Nick and Delta have decided mutually to end their relationship. At this point in time, they are both focused on their careers as they go on different paths. They remain friends and wish each other the best for the future. There will be no further comments regarding this matter."
Translation: They've broken up but will play nice at awards ceremonies.
Delta is back in Oz to film The Voice. Do you think the distance between the stars has played a part in the split?