Google/Bing check showed a ton of articles on this “90 percent” myth yet again.
They stopped using that early during the first term, because there wasn't any proof... That's what F&F was for. To gin up the proof. No better way to prove that US guns are used by the cartels in Mexican crime than for the US government to run US guns TO the cartels in Mexico... They just didn't realize there would be a few "whistle blowers" who couldn't let them get away with it.
Of course, the Ministry of Propaganda (us media) helped to bury the story. Can't let anything that might hurt the Obama regime get legs... I've got a feeling we're going to be seeing the same thing on Benghazi.