A better index is http://LangPop.com, which I recently sold on to a new owner, who hopefully will be working hard to spruce it up some, and add some new languages like Go, although Go is always going to be problematic in search engines.
If more questions are asked about a particular language I don't think it would mean that language is being used more in the real world. Just more people are confused about it.
Not sure if stackoverflow tags are a great indicator.
TIOBE tries to use job listings and google trends.
Searching job listings/search engines for 'go' probably wouldn't return much results (because of the ambiguous name) which is why its a lot lower than it should be.
> I don't think it would mean that language is being used more in the real world. Just more people are confused about it.
The two are not mutually exclusive. Rather, I'd think they're directly proportional. A very straightforward and simple yet popular language should have very few questions, which doesn't seem to be the case; conversely, brainfuck is particularly cryptic and should have many questions, yet it does not.
StackOverflow is admittedly .NET heavy, but since SV is somewhat anti-Microsoft, perhaps this will balance things out.
