Is it a native speaker?

If some one is born in a non-English speaking (for example, but applies for all languages) country, but is taught a foreign language and also language of the country from a very early age, is the person a 'native speaker' of the foreign language?

ie, the person has a tutor from early age, and speaks fluently eventually, but does not learn the language in manner of people in English speaking country, ie doesn't adquire it from the parents and other kids, but from books, lessons?

It is common in manny Scandanavian countries, where many speak English fluently but are they native speakers?

This is similar to topic in English forum but more general , I await exciting comments.

Why do te Scandinavians speak English so well? Is it because Swedish and Norweigan are closely related to English? In other countries children learn English at very early age too and people don't speak English half that well. Many of them even speak English better and clearer than the natives.