Small sample, but my dining experience is typically equivalent between Europe and the US (when comparing like-to-like for restaurant quality). The biggest difference seems to be chain dining in the US, where you get the phony "how you doing?" every 5 minutes, which I find annoying. Maybe some people consider this good service? I'd prefer to be left alone until I'm obviously in need of something (glass almost empty, offer me a refill, no need to ask when the glass is 70% full, etc).