I've never really got this whole class thing, in the centre of Edinburgh generally but mainly the University. It seems bizarre to me that you get hammered for speaking like a Scot... in the capital city of the country.
It works both ways to a certain degree. The Edinburgh Uni folk were known (perhaps still are) as "the ya's" based on... you guessed it, the way they speak - in this instance, the way they articulate the word "yes" as opposed to the standard Scottish "yasssss" for expressing positive surprise at something good.
It's weird how the elitism is generally confined to the city centre though. It doesn't even register on the scale at Napier; isn't really prevalent at Heriot Watt (even with the ludicrous amount of petrodollars going in to the Uni); and both Edinburgh College and Queen Margaret Uni are seen as more grounded establishments anyway.
Even in other home nations, Cardiff Uni has a more prestigious reputation than UWIC or Cardiff Met or whatever it's called these days - but nothing that brings it into the national headlines every couple of months. Weird.