Not in the boating world. A 28 knot cruise is pretty fast for a 65' Motoryacht. The Sunseeker though will carve turns unlike most motoryachts and at speed will do a 360 in about 3 boat lengths if you want to.
Ferrari isn't a motoryacht in the boating world. It's equivalent would be a Cigarette or Fountain or at least Nortech. I agree the handling of the Sunseeker is excellent, just doesn't in any way remind me of a Ferrari. Belle said, not even of her Porsche. More like a Lexus.