Turtle Beach is by Palace Pier, one of the best milers of his generation, who won at the highest level in Britain and France before retiring to stud. His offspring have shown they can run, and speed over a mile or less looks like the natural territory for anything carrying his name. The mother's side adds another layer — she is by Street Cry, an influence known for producing tough, versatile horses who tend to train on and improve with experience. On paper, that is a combination built for a horse that could start sharp and get better as the season goes on.
Beyond that, the honest answer is we simply do not know yet. The debut is where the story begins.