Bute was a powerpuncher and he couldn't even get Froch's respect. Froch has a great chin. Not your typical Brit.
Yes that was a brutal shot he took. He literally was caught coming in while missing a hard right of his own which made Groves punch even more potent. It was similar to the right hand JMM caught Pac with but the difference being Froch got up.
Silly quote. Firstly, there is a 3rd type of boxer (and most boxers are this type) which is somewhere between granite and glass. Secondly, Groves does not fit into the glass category otherwise it wouldn't have taken Froch so long to knock him out.
If having a granite chin means you get hit a lot but never hit the canvas, well granite chins must be as rare as 18'' dicks.