Google is loaded with ads! Even the organic results on the first couple of pages are there because of higher authority due to paying Adwords. Google ads are indexed more than anything else because the URL and ad title are readable by Google bots, so if someone is paying Adwords for every keyword, they will eventually rank high for every keyword in organic results. Googles natural organic results are not naturally organic anymore, Google are a greedy evil monopoly and want your money, pay Google and you rank high, give your money to someone else, ie an SEO company, and Google will rank you lower. http://googlegreed.wordpress.com/evil-greedy-google/
I've been using bing more and more. I like the pretty graphics they have daily. I'm easy. I like purdy colors. PS: Bing desktop is also sweet; makes the background on my 4 screens much more purdy.
It doesn't actually mean that Google is more reliable but everyone are used to Google to search anything.
Google was the best search engine, now is just the most popular. Search results despite the efforts day by day getting worse. It is not only the fault of people involved in advertising and SEO, but also the Google. It is worth to try alternatives.
Google is far from the oldest SE on the net. Google was just begining in 1998 when other search engines had been long established...