I think it is really hard to know how long it will take for Priscilla's coat to grow. It depends on the dog, I think...some grow coat faster or slower than other dogs. Since Priscilla is mixed, it may be more difficult to exactly pinpoint what 'type' of coat she has or how long her coat will grow, or how fast. You might be able to 'guess' how long it will take by using the lengths it has already grown over the time periods between clippings. But, as to final length possible, I think that is likely a 'wait and see' prospect.
As to coat 'type' I would guess that if Priscilla's coat has a sheen to it, then it is silky at least to some extent...even if it would be called a 'modified' coat. If it 'is' silky, and if it 'will' grow to a full length, it 'might' look something like Mia's when it is longer. She is golden, having lost all her black, silky, and her hair grows straight and FAST! She was cut really short when we got her on 8/13/11...this photo was taken 11/25/12 and she has not been trimmed since she came to live with us.
Priscilla is a cute girl...her coat is only a small part of her charm, but there is no reason you cannot try growing it out to see what happens next!