That puts the flowers into the range of awarded clones for size too. I'm not entirely a fan of the award systems, but it is nice to know you have a plant that can reward your best efforts to grow it with a display that measures up to the best on record. Your plant is blooming more in season for the Ros. williamsianum parent, so perhaps it will take after the more temperature tolerant side of the family rather than the notoriously cool growing Ros. grande. We'll expect an even more impressive flowering next summer.