This is a problem I have noticed many have. By smoothing out the text, and making it look cleaner, it can improve the overall quality of the image you create.
Normally, text is not anti-aliased. When your typing your text, you will notice (on the top, right below the menus) 'None' is selected (http://www.gfxvoid.com/tutorials/smooth-text/1.gif). Here is an example of text that is NOT anti-aliased: