I haven't read the article. I live in an area of Greater London that has become progressively Asian (and in the last 10 years more Muslim) in the 20 years we've been here. In fact when we were looking to move prior to DD's birth the estate agent, rather than ask us why we wanted to move, said very casually 'Oh yeah, all the whites are moving out of xxxxx...' 
Like Tiggy, we don't have any non-halal butchers beyond Lidl and Tesco Extra, all the local restaurants are Indian (or chicken shops - I think someone once calculated our area has more chicken shops per head of population than anywhere in the UK!) and any time any venue of size closes down it reopens as an Asian wedding venue. The cinema shows the main releases and loads of Bollywood films. We have 4 cake shops selling egg free cakes, you have to order in a 'trad' cake if you want it. DD is one of 2 white children in her year.
But the reasons we moved here are the reasons we stay. Lovely green areas, great neighbours, really quick & convenient commute into the City, 10 minutes drive from the countryside, lovely big houses for your money (although our neighbours don't get why we have restored the original fireplace & other fixtures instead of making it all nice and plastic modern like theirs!) and really good schools.
Funnily enough my SIL who lives 5 miles down the road in a white MC enclave keeps asking us when we're going to move, why we keep living here, don't we feel weird being the only white people when we go to the local cinema and why don't we go elsewhere to see a film (WTAF?) and suchlike. So that mentality definitely exists.
The only time it's bothered me is when DD was small and I was looking for mum friends, as I felt very isolated. I joined the NM meet a mum thing and all the messages for this area were from Muslim mothers who were looking exclusively for other Muslim women to meet. That did make me feel a bit meh. I had precisely no responses to my message and didn't meet other mothers til DD started nursery and school.
I must say though, going back to the article, my experience of Muslim shopkeepers couldn't be more different. I have to stop them from pressing sweets on DD every time I go in and I regularly get addressed as 'sister'. Lots of eye contact. We are now getting loads of Eastern Europeans moving into the area - funnily enough I went into the newsagents a few weeks ago and there was a new (Asian) guy on the till. When I went to pay he gave me a funny look and asked 'where are you from?' I said Liverpool, thinking he meant my accent, and he went mad with excitement. A real live English person! He'd moved over from Germany a month before and apparently I was the first one he'd met....:) And my lovely Anglo-Asian neighbour was muttering to me over the fence about all these Eastern European immigrants coming over here and opening their own shops and not mixing...:)