Currently MediaWiki's info action shows a table that looks similar to this:
Page Talk page Edits
Number of edits 10 3
Number of distinct authors 4 2
Number of watchers 1
Given that namespaces aren't always so cleanly paired like this (for example, the English Wikinews associates three namespaces together) and given that ?action=info is kind of 1:1 title to information based, I believe the talk page-related data should be removed. When someone queries ?title=Talk:Main_Page&action=info, they can retrieve the metadata about the talk page. Including it at ?title=Main_Page&action=info is a bad idea.