I think Cav has already summed this up.
If you agree with him!
Cavendish gave his opinion. It might be an opinion people agree with and it might not be. Either way, I don't feel it's correct to say that he summed up the situation.
It's perhaps more accurate to say 'Cav summed it up for those who agree with him'. Which obviously many here do. For myself, I kind of sit in the middle - as I said, Sagan makes me smile (more importantly I think he's an exciting and fresh new talent) but I can see how he might annoy people. Marmite anyone?