SEO hosting is like anything else. You have to know what you are doing.
I would hazard a guess that most do not know how to set it up right from the get go to maximize the value in the first place, and 90% claiming it doesn't work, have actually never bothered to do it.
I personally enjoy those who are/not webmasters citing some other complete stranger on the internet saying that it doesn't work. While those who actually have spent the time to do it, and set it up correctly, can cite from EXPERIENCE that it does in fact work.
Additionally, I would bet most hosts that are against it can't offer it. They also will go on a rant about how it's a waste of resources and na na na when web hosting in general is an endless waste of resources. Most people do not need high end boxes or bandwidth based on NEED. They buy on PRICE.
