It probably can be attributed to "Market Grading" or because the submitter was a regular well known large lot submitter. One interesting hidden aspect of the
TPG industry is the number of repeat customers and who they are. Here is a fictional scenario...
My name is Big Money Ben and I'm a friendly giant in the numismatic hobby, everyone likes me, I've got lots of coins, and give free advice/information out to those who ask. Now, I've decided to submit a 1000 coin
Morgan dollar lot to
TPG 1 co. for grading and attribution, might get a special price. I do and the wait begins. The coins come back far less than what I was expecting, hmmmm not happy... So after letting the 'word' leak out about my dissatisfaction with
TPG 1 on cyber chat rooms and internet mailing lists I crack the 1000 coins out and resubmit them to
TPG 2. I prepare the necessary paperwork and resubmit the now cracked-out
Morgan dollars. Now
TPG 2 is no fool and has eyes and ears in cyber coin land and heard what happened to an individual who submitted a very large lot recently. They also know that a happy submitter is a repeat submitter so...
Big Money Ben gets his coins back from
TPG 2 and they are fantastic. He's elated and shouts aloud from on high (In CAPPS, LOL) in the cyber coin communities about how great the services of
TPG 2 are and encourages everyone to use them over
TPG 1.
Here's where it gets funny. Big Money Ben didn't have all that money and wasn't such a good guy in real life. He has a gambling problem and has borrowed a lot of money in the hopes of reselling the coins which are graded much higher than they should be. He sells them like hotcakes on
ebay. The money rolls in and he is considered a great guy because he's letting the little guy get the chance to own one of his grandiosely graded silver dollars. There may even be a special sticker put on the slab indicating it's a Big Money Ben coin too, LOL...




Now you can see how an XF-45 coin can be in an AU-55 slab.
Take Care
No Money Ben