The text in posts is the same as it has always been, but the text for thread titles, tags and member name have all gotten a lot smaller on both the New Posts page and the individual thread pages. Also, most tag lines on the New Posts page used to wrap to a second line. Now they don't, they're all on one line. There is also about an inch of white space on the list to the right of the Last Post by section.
I can hardly read them without putting my face a few inches from the screen. The body of the posts are their usual readability.
Here's a screen capture of what I'm seeing: