To add some counter-anecdata to yours, I find there's plenty of Rails/jQuery/Go/Rust/Cloud people here in Sweden/Stockholm and that there's quite many using cloud services and what not. I find it a bit hard to digest that any of those languages or techniques are perceived as "new" here. Perhaps by some, but then that would apply at any place around the globe to some extent.
This is all anecdotal evidence from having lived in the city for not even a full year, so not saying I know something. It just seems like friends and acquaintances seem less inclined to try out the new stuff than in the US.
Sweden in general is weird though: there's like this stark difference between a smaller group of very competent people and a herd that seems to be pretty much stuck in its ways. The difference between the best and the mainline is greater than in other places. (or so it seems to me)
Yes, of course with regards to Erlang, C and C++ - but Ericsson is far from everything in the Stockholm region and in Sweden. That said, Ericsson is enormous and there are bound to be plenty of former Ericssoners in many other companies. But I find it a lot more diverse than stated in the original comment none the less. Especially if you're looking into start-ups, SME and up - as well as with the meetup.com/HN-crowds.