U2 not releasing new album till 2015?

Irish rock band 'U2' have reportedly decided not to release their new album until next year as they are still working on some songs.
However, the band has already performed 'Ordinary Love' and 'Invisible', which features on their new album at some award ceremonies.
"It seems to be taking longer for them to finish an album as they get older, but the great thing about U2 is that the whole of the record is always better than the sum of its parts," a source said.
"That magic that the band always seems to capture...They have yet to capture it," the source added.