To answer the question, I'm not sure when you can say "I'm from Philadelphia". I think the unspoken rule in NYC is that you live there for 10yrs before you can call yourself a New Yorker. I would say for Philadelphia maybe 7yrs, as long as you've been converted to Philadelphia sports teams... because how can you rep being from Philadelphia if you're not rooting for the city & their teams? Anyone have any thoughts on this?

Nothing annoys me more than when I meet people & they say they're from Philadelphia & then I find out they're not from the city at all. Using "I live near" is definitely the way to go.

This even happens with people who live in the city but in different neighborhoods. I don't know why, but I've noticed a disproportionate amount of people I've met claim to "live" in Fishtown do this a lot too.

"I live in Fishtown" then I go to the neighborhood & they're like "oh here's my address" turns out it's a 20 minute car ride away. I 100% agree, just say "I live near" instead.