Say you cut your strips on the LOF grain, then cut into squares. 2 sides of the squares will still be on the WOF grain.
Say you cut your strips on the WOF grain, then cut into squares. You still have 2 sides on the WOF grain. What's the difference? Nothing!
Of course, Marti uses a lot of templates so maybe she feels she can place one side of her template on the straight (LOF) grain if she cuts LOF. Seems to me she could do the same with WOF grain strips.
When we're talking pieced blocks, I don't see a lot of 'gain' on the grain, LOL!
Jan in VA