Good point. The information out there is indeed confusing.
After doing some research and reading some papers this is how I interpret the facts: The connection between
HPV and cancer of the oropharynx (tonsils and base of tongue) has been proven beyond doubt. I believe the article from May 07 in the New England Journal of Medicine is crucial to make this particular connection air tight.
As far as other types of oral cancer go, as long as there is not evidence of a similar caliber as the NEJM article I am not worrying about it.
Johannes
HPV+, high grade anal pre-cancer