I am not entirely sure what you are asking. Thats a typical xc frame now. It gives room under your groin to let the bike bounce around. Race bikes still use a more road agressive style with the seat up your butt.

Personally my seat FULLY extended 410mm just hit level with the handle bars on one bike. On another the seat is level at my riding position and my bighit the seat is level but the whole bike is kinda short It depends on your riding style and what you consider agressive.