Its slightly ironic, since Edinburgh is a bit of a snobby city.
Glasgow has the warmest people in my experience. Get this: I once had a couple of lads ask me how old I was and if I wanted a fight. I was like "?!? oh... no thanks" and they went "no problem pal! huva nice day :)" and wandered off in high spirits.
In the various places around the UK I grew up, people only ask if you want a fight as an ironic statement, not an actual polite question :D
RE: Scotland: To the Skye and back! [Only a short flight from Lisbon, just saying]