I agree that the way you see these things can depend a lot on who's around you... I was the first of my friends to get married, when I was 23, and most of my friends are older than me. And everyone was "oh wow, I can't believe you're getting married so early".
Now I'm 25 and none of my friends are married or have kids or anything like that, I think in France (where I was born and raised) you're not really expected to get married and have kids before you're 30 (gives you time to finish your studies and all that stuff).
If everyone around me had already been married when I got married, I'm sure I would have felt differently! As it is, I kept wondering if it wasn't too early, if we should wait more (we'd been together 3 years), things like that.