Why would we care what some random a**hole on some other board says? You should provide quotes from a credible source if you want to back uo your argument. Anyway I disagree with the whole argument. Mariah is immensely respected as a vocalist, she's regularly mentioned on talent shows when giving examples of the greatest vocalists, hell I've even heard her name mentioned in the same context everywhere from the Real Housewives to the Ali G Show. Countless artists have praised her talents, both older legends and up and coming stars. She's been mentioned several times as the mainstream artist to first combine pop and hip-hop and ushering in the rap/sung collaboration.
Until you can show me an article by a respected publication stating that 'Mariah Carey is untalanted with a career that has had no impact on music or other singers' I will treat this as just another bitchy board queen's irrelevant comment.