In general I tend NOT to respond when someone questions something that I say because it leads to arguments.
It may be a placebo effect but I have found that most certainly .com is favored and.info performs the least well in my testing. This is not something I read in an ebook rather something that I've gathered from first hand trial and error. It may in fact be mistaken, I wouldn't challenge someone that disputes it because I've never done a real scientific test.