Not ture at all.We just had a long wait for Ultra Blue, and it was only 2 years really. Deep River was 2002 BUT Exodus came out in '04 (no pun intended).The other albums were one year gaps:

First love(1999)
Distance(2001)
-no gap for these two-
Deep River(2002)
Exodus & Single Collection Vol.1(2004)

I can see an album this year.More than half the songs on Ultra Blue were release prior to the album's release,so I can picture her writting a couple of more songs during 2005 but they probably didn't go with the theme of Ultra blue so they'll get held over for a 6th album.It's a hunch anyways.