I personally dont think you could give Cotto more than 4 rounds in that fight..which is still pretty amazing. Cotto did however embarass Floyd in round 8. I've never seen Floyd outboxed but thats exactly what happened. Cotto hit and didn't get hit. Floyds frustrated smile told the story.
Also Cotto should be commended for landing much more than is normal for an opponent of money..all whilst bringing down Floyds usual connect percentage.