Different application have different scalability characteristics (how much can be cached? how much integration is there?). A certain number may look very impressive for one sort of application, but not so impressive for another.
E.g., some of Yahoo's non-search properties receive tremendous traffic but their scalability stories (while still requiring a great amount of difficult engineering work) aren't as interesting as those of Facebook or other Yahoo properties e.g., Search, Flickr.
E.g., some of Yahoo's non-search properties receive tremendous traffic but their scalability stories (while still requiring a great amount of difficult engineering work) aren't as interesting as those of Facebook or other Yahoo properties e.g., Search, Flickr.