Are they true mancs though.
I noticed that the blues that don't come from Manchester, i.e. they are more Greater Manchester, make an effort to try and be more Manc than the rest and want to talk about plastics, rags, glory hunters, blah blah. Whereas the Manc blues like you say are pretty sound on the whole.
Even met a Salford blue at a hotel when we met them in the semi-final at Wembley years ago. He was a good bloke, after he had a few bevies he lost it a bit trying to tell us Salford was blue, but other than that just typical banter.