BostonMaggie catalogs the different levels:

... Hunter Green: Family stayed in Dorchester . Thinks the South Shore is the Cape. Knows every Irish bar in the city. Wasn't happy this years St. Patrick's Day falls on Saturday, because it's a Suffolk County holiday and he'd normally have it off anyway. ...

Check this article out about the decline of Irish immigration and its effect on the community in Boston. Apparently, Irish numbers have dwindled in Boston, especially since 911.

It makes me kinda sad because I've always thought that the Irish influence in Boston was one of its most important cultural attractions.