And here's the best part! Carl also included quotes from the agents that decided to offer representation due to these outstanding queries. So not only do you find out how much trouble the author had with their query, but what actual details in that query attracted an agent enough to offer.
And--a little boasting here--my query for Pygmy Hazards is his first victim. Go here to read about my struggle to write a query letter, and what Sarah Negovetich thought about it.