Yeah It was only for a few months, but there was definitely an emphasis on the writing sample itself over the query/cover letter (one letter was pretty much a single line stating the title, target age and word count). I personally didn't choose things out of the pile to read, but the lady who did said she chose ones to read first by their concept and title, as well as reading a couple of lines from the sample. I wish I could be more helpful!
Thank you for this feedback! The bit that interests me the most is that the title has importance - every book I've produced has had a title changed by an editor, so I've never attached much importance to them (and, indeed, the book that got me my first agent had a VERY silly title indeed - which maybe worked in its favour...). I guess the concept of the book roughly equates to the idea of the "elevator pitch" i.e. what's your story about in a line. I have seen some UK agencies ask for this to be included in the covering letter, which makes me wonder again whether UK authors sweating about producing a US style query is quite so important... Argh! confused! *is going to work on her query this morning*