I tasted one of the fruits and it had the rather bitter grapefruit taste that I remember from years ago. I liked it, but the commercial grapefruit available nowadays are certainly much sweeter and - as Millet says - often with red colour.
quinoah - Citrus here frequently have a second burst of flowering in response to a warm summer, after a cool spring has produced limited flowers. Perhaps that is why it is said to bear fruit year-round. But equally, in cooler climates, individual fruits can remain on the tree for many months.