I'm growing a delenatii too and it grows extremely slooow. Mine hasn't flowered yet but I imagine with the growth rate I'm seeing it would be normal for it to flower and not even start a new fan yet.
The foliage on the delenatii is probably my favorite out of all of my plants. Most jewel orchids I'm afraid can't compare. So bold, sparkly, and detailed but hard to capture in photos.