Well I have adjusted the brightness and contrast in-game, and while it helped with other graphics, text message are still unreadable. Again, my beef really has to do with their color scheme more than anything. If you pull up the phone, each category has white text on a black background. It's a bit small, but I can read it from a distance without too much trouble.
But when you pull up those text messages that are black on a dark gray background, I have to ask myself, WTF where they thinking? Why didn't they make the text messages the same as the menu, i.e. white text on a black background?
As for adjusting the TV itself, I'm VERY reluctant to start messing with it's settings when everything else I watch on the TV (including other video games) looks just fine. It's just their damned ridiculous programming in this game that causes the problem.