I attended an SCBWI conference last spring where the two critiquers--one editor and one agent--gave feedback on first pages. (A moderator read the page out loud so we all knew what they were reacting to.) The PBs were quite interesting--the most experienced, best mss were the leanest, not just in terms of art notes but also text. Instead of, say, "Eloise bounded down the stairs, still struggling into her jacket. She sat at the kitchen table, took a bite of her waffle, and said, 'Hey, dog!'" the experienced PB writers would say, "Hey, dog!" Because all the rest of that stuff will be shown by the illos, right? So what was left was a very lean structure--a scaffolding, really. And both the editor and agent tilted their heads and got dreamy expressions and nodded. It was a bit of a revelation.