Hermione turned to Harry with a radiant expression and whispered, “Did you really tell him I’m the best in the year? Oh, Harry!”
“Well, what’s so impressive about that?” whispered Ron, who for some reason looked annoyed. “You are the best in the year — I’d’ve told him so if he’d asked me!”
Hermione smiled but made a “shhing” gesture, so that they could hear what Slughorn was saying. Ron looked slightly disgruntled.
Harry Potter and the Half-Blood Prince – J.K. Rowling