In which book? Don't Make Me Think?
"Welcome to" as a splash page is usually a waste of everyone's time... the exception might be if the main page is only a portal to various separate things (like a web site for a large manufacturer who makes stuff in very different areas, like X-Rite for example and one would expect users are only interested in products in a certain field).
"Welcome to" on the home page can maybe be a little redundant, but it depends on the purpose of that page and what it needs to say. It's nicer to have on a site where the purpose of that main page is to bring a welcoming feel to the site and start gently showing users what they can do there (like a kids' site). Most of the time, people know they're at the front door already and they may skip any block of text that starts with "Welcome". Jakob Nielsen has some research data indicating people read the first word or maybe two of a sentence before moving on, unless they're really reading the content (which many people don't).
Usually it's companies/clients/bosses who want "welcome to", not a feature request from users.