It was cool of him to go to DC and write back, for what it's worth.
In edit: Here's what he said to Cor over at the Fool:
Hi Cor,
It was no hoax. The only clarification that I made over on Yahoo was that I wasn't sure whether it was to start buying $10,000,000 dollars worth or 10 million shares in 20,000 share lots. I did not overhear any time frame.
The person who made the call was well known by many in the room.