I am not surprised to find reports that some of the info on Wikipedia is wrong. Over the past few months I have personally amended several entries. Some of these I've discussed on this blog: Skitch Henderson, William Rehnquist, and Sheree North. Based on census and other record research, I've also made changes to entries for a diverse range of notables including Ted Williams, Alice Cooper, Rodney King, John Derek, and Phyllis Diller.
The errors are usually in birth name, ethnic heritage, or birth year. A lot of these entries must be based on press releases. I've yet to find anyone younger than the age given in Wikipedia.