I'd say that'd be considered a massive metro area by most anyone's standards. I consider the metro area I reside in to be pretty big, and it's only one million.
I'm guessing that small-town culture varies somewhat between regions, too. The town I grew up in is in the midwestern US, where people (in my experience) tend to be conservative and narrow-minded. When I traveled the US a few years ago, I recall a lot of the small towns on the west coast seeming to being full of single twenty- and thirty-somethings, old hippies, eccentrics, outdoor types, and the like. In the midwest, south, and northeast, it seemed like I'd only see people like that in the urban cores, with the smaller outlying towns mainly populated with families. I didn't spend any appreciable time in any of the towns, though, so I could be way off. Anyhow, getting to my point, I can't help but get the impression that the west coast small towns might be pleasant to live in, and that their inhabitants would be less judgmental and gossip-prone. I'm sure small towns vary widely between different countries and regions of the world as well.