The only part of NS where I could say the accent sounds Bostonish would be parts of the Annapolis Valley and of the South Shore, where you do find that dropping of the 'r' in many words. The rest of us, mostly influenced by our Scottish forebears, are quite wedded to our 'r's'... or maybe it's pirate influence - Arrrr!

However, there are scads of Irish-Scotch-Welsh descendants in Boston. Years ago I met some people from Harvard's Celtic Studies dept., in Cape Breton. It was fascinating talking with them. Most of them were musicians as well. Willie the Welsh flute player and Andy, of Boston, if you're out there, I remember you fondly though it's been almost a quarter century. ;-)