Of course, Google's infrastructure is great, whether MapReduce or GFS. However, if Bing gets to a point where their search results are clearly better, then Goo

Of course, Google's infrastructure is great, whether MapReduce or GFS. However, if Bing gets to a point where their search results are clearly better, then Google will be in trouble, and no amount of screaming "we have a better infrastructure!" will help. Users want the best results, and that's why Google originally won against other search engines. I don't know if that's ever going to happen. Probably not, but I would not bet on it.