That is more or less accurate. I suppose everyone has to have their niche, and Griffin's niche is talking about other (better) celebrities. Sometimes this works, and sometimes it does not. Making cracks about famous people is usually good for a laugh, but sometimes the jokes here just are not really jokes at all, but observations.
The subject matter also makes the special dated. Already today (2013) the comments on Taylor Swift are dated and therefore not very funny. A large segment is concerning Cher, who I was not aware was still a big deal for anyone... but, who knows?