I think Quizno's is in the gutter, and Brenemann stepped down as CEO last Fall to focus full time on CCMP.
Regardless, his turnaround of Continental Airlines was legendary (and it was really what propelled Texas Pacific Group to the next level), as was the sale of PwC Consulting to IBM. He's definitely someone you would write a case study about.
Maybe a bit cliche, but I really loved this quote:
But I remember something that Mitt Romney told me at Bain. He said: “Greg, in any interaction, you either gain share or lose share. So treat every interaction as kind of a precious moment in time.” And I’ve always remembered that, because I think it’s really true. So what I’ve tried to do is have more conversations where I’m gaining share than losing share, to try to add value to everything.