Does Ingredient Order Matter in Quick Bread Batter

I notice that some quick bread recipes instruct to add oil last, after all the other dry ingredients and wet ingredients have been mixed. Typically, the oil is mixed with wet prior to combining with dry ingredients. Wondering if adding the oil last, 'out of order' so to speak has a purpose, does texture or anything end up different? Why not combine wet ingredients as usual rather than hold out the oil until last?