Greasy Fork

I get script feedback almost every day, but I found that when the link is opened, the feedback time is 5 minutes apart from the email time.

When I'm in front of my computer, I rely on email to respond quickly to feedback, and for simple questions, I respond within 1 minute.
The 5-minute email notification interval may affect the efficiency of communication and discussion.

I don't know how other people will do it, but I like to be notified of feedback faster, communicate faster, and solve problems faster.

I'm guessing the 5 minute delay is to allow time for editing comments.

Yes, one of the reasons for the delay is to allow time for editing comments. Another is to allow for the spam check to happen and to not notify if it's determined to be spam.