I revisited website submission pages for the four agents who've not yet responded. One said if she wasn't interested in seeing more she couldn't guarantee a reply, even with an SASE. I'll count that as a rejection, and take myself to 5/8. Another agent requests the submitter, me, to follow up if I haven't received a reply in six weeks. That would be now. Another simply said to allow five to six weeks for a reply. No website for the last.
One down for the "no guarantee," one follow-up email to send, and two fading question marks; that's today's inventory.
I'm discouraged, but still moving forward, and that still feels healthy.