Were you told so by Kikuta? If so, that's official, but I'd like to keep the album title as Ryusei Kiseki.
EDIT: also, Kikuta's blog states the singer was supposed to be Miku Hatsune, but did it end up with Luka Megurine?
http://hirokikikuta.com/blog/announcement20100718.html
http://hirokikikuta.com/blog/comiket79.html