I don’t think [querying every single agent in the publishing industry at the same time is] very good strategy on the part of the author. If you didn’t get it quite right the first time and you’ve sent it to everyone in publishing, you just lost your chance at tweaking it a bit and trying again. If you rush the submission process you lose the ability to evaluate and adjust as you go. … Going at a steady pace can be frustrating and tedious, but it gives you time to research agents and personalize, to keep working on new material, and to give yourself time to look at your query and opening with fresh eyes.
[S… this is the quote I was talking about. Kind of apropos in more ways than one this week!]