No man can spend all his wealth just to grab some pieces of pizza.
Before he made an offer to buy 2 pizzas for 10,000 BTC, I believe he had way more than that to sacrifice. When a man uses something as payment, it shows that he believes in it, even though Bitcoin has no value attached to it.
I think you both are practically on the same page, unless for the fact that one of you is saying the purchaser is holding more than 10,000 BTC and the other claim's it's just 10,000 left over BTC use to text if it can run a successful transaction.
I believe he have more than 10,000 btc for him to be able to use it, means he spent little to see what the value of the others will be since a price of 41$ was tag as the value of the 10,000 BTC since that's what the 2 pizza worths