XF 1.5 Display post count under user name on posts?

Can I display any more information under the user avatar, name and title that shows beside every post? I use user title to indicate people who have posted 10+ and 100+ times, but I would like to show the number of posts and date they joined the forums. That information does show on the member profile.
New question, same topic.

Where do I change the look of the message elements? For example, I would like to display user location, but would like to remove the field title "Location:" because it takes up too much room.
Thanks, I did it by changing the styles. The Location title does not display and the location field floats left. Easy to do because XenForo has great style sheets - easy to find what you need to change. Thanks!