Google does have problems....
Not only from what the article mentions but I've noticed that if I enter a search and click on a link Google will open a new window to something like Amazon or Ebay for "prioducts I might be interested in" with nothing related to the search terms. Seems weird but close the open page and reclick and it works. If' I'm in the same search mode and look at more results, it will dump me to product page ever so often. Funny how it works. I search something like "WWII sea battles" and get products for hair restorer or makeup or other items just as wierd.
Aggravating to say the least. I've used Bing and the Bing clones like DuckDuckGo but don't get as many relevant hits.