In the US, of course, people date more casually, date multiple people at once, and there is sometimes a declaration of being exclusive and ultimately, putting a label on things.
When I dated the horrid Irish guy, he got upset that we weren't boyfriend-girlfriend within two weeks and that I was still active online. Last night, I met Jacqueline's sister visiting from England, who confirmed more nicely what Irish guy said.
There's no wrong or right way in modern dating. I'd love to hear people's experiences overseas!