Emma Watson stopped by for a chat with David Letterman Monday night before the New York premiere of the final Harry Potter film and explained the difference between fans in America and England. The reserved Brits, she said, are more likely to give you a “Well, that was very good,” while “warmer” Americans tend to go with an enthusiastic “That was awesome! That was awesome!” (Apparently, some of us also still pretend we’re in Arsenio Hall’s dog pound.) Watch the exchange below. She’s a smart girl and doesn’t fall for Dave baiting her into agreeing that Americans are dumb. She acknowledges that fans, like the actors, are “weirdly emotional” over the premiere of Harry Potter and the Deathly Hallows — Part 2. Check out Lisa Schwarzbaum’s review of the film, along with our gallery of red carpet pics from the premiere.