All browsers have a "Zoom" setting where you can increase or decrease the size of the webpages. I think a lot of folks are using the default settings and things look too small when you have your screen resolution set to a high level.
The problem is that it may help some folks see things a bit better to post with a large font, but to the large majority of readers the fonts look humongous and the post is very hard to read.
On IE you can change your "Zoom" by clicking the little magnifying glass in the bottom right of the screen. Usually just above the "clock" on Windows systems. Try setting it at 150% or 175%.
On Chrome you just need to click the three horizontal bars in the upper right of the browser screen. You will see the "Zoom" option in the drop down menu.