To me this is proof positive that many of these records were incorrect. If he had spent 15 years diligently pursuing this hobby and had seen some of the rarest birds in the world, he would not immediately offer to take them off his list when met with skepticism.
The reason to say this explicitly rather than, e.g., "well whoever was first, they both deserve congratulations," is that by making his fake list, Jason diminished Peter's accomplishment, if only temporarily, and caused Peter to change his plans of seeing 10k with his family.
No personal animosity towards Jason--I'm sure he's gotten more than he bargained for here. But from the standpoint of closing the book on this unfortunate chapter I think this response of his deserves attention because it essentially proves that his list is incorrect.
. His explanations were nonsense, and he still claims to be 10k+. Teleportation to 10k (or close to it) and signing off with a show of faux virtue, managing to roll back some of his widespread ridicule, is a great compromise for him after comically overplaying his hand in front of the entire birding community. A busy person in a competitive business, by his admission, having barely birded outside the US until July 2007 and virtually unknown (no pun intended), is not a recipe for 10k in 15 years. Btw he has expressed an interest in world records and made a dubious claim related to his very first trip to South America - the post in the link below is not very consistent with maintaining a publicity-free quest to 10k 
