No, not bollocks. There's lots of elements in the Royle Family that working class people will have experienced first hand, and better-off middle class people won't have. This makes seeing them depicted on-screen all the more bitter-sweet for working-class people.
I'm not saying middle-class people can't enjoy it, or can't like it, or can't appreciate it. But there are certain elements within it, certain references that they will only ever be appreciating as tourists in another type of culture, rather than as people who have actually experienced it first hand as a regular part of life.
I'm generalising to make a point, naturally, but most of the middle-class people I know have not experienced the black market in their living rooms, they haven't experienced catalogue culture and the phenomenon of paying your weekly monies to the GUS agent, they haven't experienced the nature of subbing other family members their fags until their money comes through, they haven't experienced the way in which extended family is used as a primary source of care for younger and older family members as opposed to using nannies/creches/paid help, they haven't experienced the phenomenon of the pub as social hub for the community in the same way, nor alcohol the social signifier it is in working class communities, and all these are elements I recognise in the Royle Family direct from growing up as a working class person.
I could go on and on and on as to why The Royle Family is a working class comedy written by a working class woman which will hit certain notes with working class people in a way that people not of that class can appreciate, but only secondarily, rather than primarily.
But I won't; I've made my point.