> Twitter the server is hard and requires hundreds, twitter the client is easy and requires 1. You are severely understimating the amount of work that goes int

> Twitter the server is hard and requires hundreds, twitter the client is easy and requires 1. You are severely understimating the amount of work that goes into a (web) client application that is being used by as many people as Twitter's - UX design and testing, accessibility, internationalization, browser compatibility (including lots of exotic ones you may never have heard of)...