Hmm, I think maybe this feeling stems from the lack of british publishers. There used to be a number here in britain (ocean, codeys, eidos) but have all since left apart from codeys. Those guys used to publish all sorts of games. These days all publishers cater to american tastes and the american market.
But all is not doom and gloom, to be honest there's a whole bunch of indie developers living in caves and lurking under rocks here in the UK. From the introversions and the positech's to the stickman guys, moonpod, tuna, the list goes on.
The point being, they are alive and well and making great games. The biggest issue we (I use the word we because I still create my own games too, despite being in the industry for a LONG time working for one of those original british developers) face is that there really isnt a press outlet for us that really advocates these types of smaller studios. Keiron Gillen has done wonders for the recognition of Introversion for sure, but he's only one man.
These days I teach game programming and design while doing my own thing and I must admit, it feels like there are fewer people who want to setup thier own company and go it alone, I don't have an answer there.
But britains bedroom programmers are alive and well and living in a rainy bedroom somewhere across the pond