Yes Isabel, I'm really supprised at this "macro" too. The Canon 70-200mm F2.8 L is truely a great lens! It's not just a sharpness, I think the biggest differences between this lens and the consummer lens is the resolution, the dynamic and the feeling of the picture in general!
Nice "macro". I was surprised to find that the 70-200 f/4L was great for butterflies. They are less apt to fly away because you can stand pretty far away from them with the zoom end of these lenses.
Isabel