Do you notice a difference? Probably not and you aren’t supposed to notice one. I just redid the grid that I had so that it is fluid. You should be able to hit CMND+ or CMND- to increase and decrease the fontsize while maintaining the overall layout and proportions (except for the graphical elements). This layout is in no way as complex as something like blueprint and I’m not sure I could cut up something like that for a blog theme in a day. Maybe over the course of a few weeks I’ll try to design something.