Just curious about how Google delivers such quick results and which language enables them to do that and write their amazing algorithm. therefore that language must be a very good language, if not the best.

Anybody know? thank

It has little to do with the language being used, the infrastructure is more important.

Googles infrastructure is basically spreading its index over multiple servers, hence the reason as of why google never seam to time out, despite how many uses google as their search engine.

Their own about page: http://www.google.com/corporate/tech.html

I would say that they are more likely to use multiple languages, then rely on a single language alone.