This is what Merriam-Webster says: "Webster's Third New International Dictionary, Unabridged, together with its 1993 Addenda Section, includes some 470,000 entries. The Oxford English Dictionary, Second Edition, reports that it includes a similar number." (That's different from the other list I saw.)
But absolutely agree with your point. It's not like Britain and US vocabulary differs markedly in books and speaking.
But absolutely agree with your point. It's not like Britain and US vocabulary differs markedly in books and speaking.