Yeah, being bilingual may actually be an educational advantage.. I think of it like learning one language is understanding syntax, learning multiple languages is understanding the underlying concepts.
I don't know if the Finnish people I have known are exactly representative of the whole, but they were all bilingual (ie. parents spoke finnish and english or swedish at home).
If most Finns group up bilingual then maybe that's their advantage (or an additional advantage). Studies link growing up bilingual to improved cognitive abilities[1]
In most parts of Finland, people only speak Finnish at home. It's mainly just Western Finland (and Helsinki to a lesser degree) where there are lots of finnish-swedish people that are bilingual. Elsewhere everyone tends to know English pretty well, but Swedish isn't nearly that common.
I don't know if the Finnish people I have known are exactly representative of the whole, but they were all bilingual (ie. parents spoke finnish and english or swedish at home).