not to mention, a lot faster!

I saw that too. i cant remember who did the tutorial.. i think was it missouri star quilt company? on their youtube site? their tip was using spray starch to stabilize the bias edges

Thanks!

To add to the previous: Cut squares 1 1/2" larger than the final size you want i.e. Cut 4" sq if you want 2 1/2 cut qst

For me because it is easier and faster. Try both ways and see which works best for you. I am sure you will find doing the square is the one for you. Trying to sew a 1/4" seam on the bias is the pits, as far as I'm concerned.

Yes, it helps eliminate the bias problem and stretching

For me the most accurate and easy way to make half square triangles is to use Thangles papers. I used them for the quilt in my avatar and it was a lifesaver with all those triangles. Saves on fabric too. www.thangles.com
You just cut strips of fabric the width needed, layer them with the paper, and then sew on the sewing lines and cut on the cutting lines. Press while the paper strips are still attached and it will be even less likely to stretch on the bias seam. It really is worth the money to buy them. Anyone else found them helpful?

It helps keep the bias from stretching and makes it a little easier stitching. :D

I am thinking that you don't realize this is done when TWO square pieces are going to be sewn together. When you cut the center line, you get two triangles with no bias to deal with. I got the feeling from your note that you may have been asking why you have to do this on a single square. Never heard those directions for cutting one single square, only sets. If I am wrong, I apologize.