for example, last Monday from 10 to 11 AM, 30% of submissions reached the frontpage and so it was, in effect, a great time to post. But it might also mean t

for example, last Monday from 10 to 11 AM, 30% of submissions reached the frontpage and so it was, in effect, a great time to post. But it might also mean that less people see your post, which is still better than not making the frontpage at all, but not the same as getting there on "prime time", this should also be taken into account.