Sure, i happen to know a few things about FTO. Firstly, most people solving FTO (in fact ive only seen one exception) nowadays use bencisco and algset extensions to it to solve it quickly. This includes every single person that is ranked bronze or higher. Also, i would say a decent time is something under 25 seconds. This is probably a bit slow compared to other milestones in wca events like sub 30 4x4, sub 1 5x5, sub 2 6x6, and sub 3 7x7, but nonetheless it is in line with them since fto is a less complex puzzle than 4x4, more complex than 3x3, and it is in some sense more awkward to turn than nxns so you almost sort of dont expect it to be as fast. Let me know if you have more questions about the puzzle, id be happy to answer