It depends on who you are and where you are.
I'm not naturally very outgoing, but I'm not socially cut off. I can make friends, but not as easily as some others. On the other hand, there were some people that I "clicked" with instantly and considered them a friend (though not a close friend) after a day or even less.
As to where you are, some countries and some areas have cultural standards that will inhibit making friends speedily. Two of my friends moved from the southeastern coast of the U.S. to a major city. They made more friends in two months in the city than they did in two years on the coast.