I have a C&C 34, and while my experience is limited, I don't think of her as tender... more as spirited. I find she just likes to sail at 15-25 degrees over... almost no matter the wind speed.
I had a problem of her rounding up in gusts, but now I just trim accordingly on a gusty day, and not much issue anymore.
As for hull speed, I've had her above hull speed for consistent stretches, without feeling like I was on edge of control.
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