But if a person has been desiging "big-name .coms" I think they wouldn't normally be involved in teaching others.
Good places to study design have large numbers of staff who are 'visiting professors' and similar. They spend most of the week working in industry and are selected because they are at the very top of their field. In addition, full-time staff should be working at university spin-off companies or doing industrial consultation work.
Degree level courses are sometimes structured like advanced level college diplomas and are founded on the idea that textbooks are a good source of module content. Just be sure you're not going to one of those places but to somewhere that uses people of a higher calibre than the textbook authors and which teaches you so much more than a textbook could ever relate.