The rest of the world doesn't care about NSA surveillance so 600% doesn't really mean anything and is meaningless. Hell, a lot of people don't even know what Bing is!
If anything people outside of the US care more about the NSA revelations. Because it's an foreign government snooping in shit that they have 0 business to snoop in.
Likely even more so. The U.S. is at least making symbolic (if not substantial) changes to laws like letting provisions of the PATRIOT ACT expire, while the UK is secretly making domestic spying legal through secret laws.
I also am British and use DDG, but the comment was about the vast majority of web users around the world, who still type google into google to get to google.com
You are correct, the vast majority of web users do not care about surveillance.
But the early adopters do, and these are the high technologists, the users of HackerNews, and it appears that these are the ones driving the change. The other replies to your comment sadly seem to equate the "rest of the world" as non US early adopters / users on HN.
This may or may not lead to the late adopters coming along to DDG in a few years. If they come, it will not be because of privacy matters, or the bang syntax but because a) it would be better and/or b) everyone else is doing it.
We absolutely care; DDG user from Liverpool here. Not just because of NSA surveillance but because of privacy concerns in general, and especially concerns regarding Google.