  There is no such upper class in Finland who speaks Finnish more formally than someone else. Some people use the formal form, but in spoken Finnish mÃ¤ oon start to be more like a standard than exception. Even president uses it - even though this is something I dislike in her. When giving statements to media one should at least try to speak more formally.  And then in dialects this may be different. Mie oon is still common in Carelian dialect and it should stay that way.  I've noticed that on speech people normally use mÃ¤ oon/mie oon version but minÃ¤ olen is something like French moi mÃªme, 1st person with emphasis. If someone begins his sentence with standard form, everybody really should listen.