Maybe those "2 yrs" were the last 2 years of his/her PhD program. Anyway, maybe s/he entered with a Masters, which could be compulsory for the Euro-style progr

Maybe those "2 yrs" were the last 2 years of his/her PhD program. Anyway, maybe s/he entered with a Masters, which could be compulsory for the Euro-style programs, and not counted towards the average length, which may be 3-4 years.