No, I don't agree with you as I thought Clegg was as uncompromising with Brown as he was with Cameron, if not more so.
What he did very well was play the middle ground card which used to be the preserve of the tories before Blair stole it. It was very canny.
Brown is a cu*t and no matter what he does, a seismic shift isn't going to occur so it was Cameron's chance to really shine, avoid sounding like a toff and to project a sense of being a premier in waiting and I thought his own personal performance was well short of that which I'm very surprised at.