I don't know of any polish couples where the wife or a girlfriend is older.
My great-grandmother was middle-aged when she married. I'm not sure she was actually older than her husband, but in that day and age a 40-year-old bride was not run of the mill either. My mother was 6 years older than my father. I am 7 years older than my partner. One of my friends has a bf at least 7 years younger as well. They're getting married soon. Etc. I am 40, and I have never heard of any older/younger prejudice. Sure, most guys tend to go for the younger crowd, but if they settle down with an older woman it's not really seen as a big deal. Is it just the people I hang out with?