If the blogger's only blog is in the future, the blogger does not show up on the Recent Bloggers list.
If a blogger already has published blogs however, the #Posts and Date in Recent Bloggers includes the future blog, which is incorrect.
The stats in Recent Bloggers portlet are obtained directly from the BlogsStatsUser service table which tracks cumulative info on blogs and is updated when a blog is created, even if the blog publish date is in the future. Since there isn't a trivial way to obtain the count of past blogs or last blog date prior to the current date, the fix seems to be beyond the scope of a "Paper Cut".
I won't be doing any more followup. This bug will not be fixed as a Paper Cut unless someone else would like to take a look.