I guess guys (or lesbians) who love seeing girl-on-girl action will enjoy the Screech video. Since I'm neither, it was a rather dull or even pathetic bit of film making. However, I did want to verify what everyone has been talking about, in the past -- when "Screech", his wife, the gossip mill, and the video's distributor made it sound like Dustin was exceptionally endowed -- and more recently, or after the comments of someone like Howard Stern.
I'd say the only thing that stood out to me was when one of the young women in the menage a trois does say that Dustin Diamond is large for a white guy. So it comes down to the eyewitness account of someone like her versus people like a shock jock watching from afar.
But the shock jock probably has the more accurate description, although maybe the angle of the video cam that "Screech" was holding distorted perspective, by making things look smaller (or less large) than they really are?