I got a 4n seedling from SVO 2 years ago and I don't think its going to bloom for another 2 years based on size. I bought it with a 4n Dowiana (likely to bloom this summer), and encyclia phoenecia (bloomed 6 months ago), and a aurantiaca f. punctata (bloomed a year ago).
The 4n amethystoglossa is a super healthy plant though, attractive even without flowers.