Sharing in case this has happened to others. I've queried Lauren Spieller twice (and a third time today) and each time I never got a response, but then her blog would say "I've responded to all queries sent before X date. If you haven't received a response, please resend." Since mine would fall in that category, I'd resend.
Feeling a little lost, I rechecked the guidelines to see if I was missing something. And yes, today I realized her query requirements on the Triadus page are a little different from the others, she requires that you have age category and genre in the subject line, as well as QUERY. This, I suppose, has been getting my queries ignored? I hope? Anyhow, in the interest of science, I resent it (again) with the correct title. Will update if that gets a response.