In Firefox, I bump up the font a couple points and it helps. CTRL+ and CTRL-, or CTRL help too. BUT if I follow a link to a new page it ends up in the smaller sized font. Not to mention, once you start playing with font sizes, a lot of web sites have windows (usually, but not always advertising) that cover the text, or the text inside those non resizeable windows "grows" behind the window--Like the /. videos window.
Fact is, we've had computers on our desks, or on our laps for over twenty years now. People who were young when they first starting using computers are on the verge of needing a little help with their vision. By now it should be easy, intuitive, universal and platform agnostic.