Just finished reading a story by Randy Campbell in the 2-11-2008 Coinworld. His last line is as follows "I market-graded this beauty as MS-65" This from a self proclaimed "ICG senior grader" Page 44 for those who care to read it. Proof in the puddin so to speak....
Jim it's well known that all of the TPG's use market grading. Even the ANA's grading standards are based on market grading.