I'm sure he still gets "tired" of the detractors. However, his enthusiasm seems to remain lighter than air. ;')
Grounded in a deeply held confidence I'd wager. This is a really neat find in what is essentially in our own back yard. The old theories will continue to fall one by one. Just how far back will the bone diggers find evidence of civilization is the question. 15,000 YA to 50,000 YA is quite a jump, but if I were a betting man I'd bet they will eventually find evidence older than that. Call it a hunch. Since I don't really have anything else to base it on ;^)
FGS