Concur with origin of Phrase " bone in her teeth", it was also used under 'Steam' to describe a ship with speed on.

With regard to modern Yachts, you must bear in mind that hull design has grown more sophisticated. If a hull design is working under optimum condition she will not show a bone. The energy used to raise the bow wake is wasted, you may pour on as much power as you like, but the speed will not increase in proportion, it's spent in thrusting the water aside.

Gareth