Several were hanging out after the event. I think we all had a different number beginning with 7-8 thousand. There were no more than 10-15,000...maybe 20 IMO.
As in all the old media reports "Tens of Thousands" would have to mean more than 10,000,because tens is plural,so it couldn't be 10,000.
It would have to be 20,000 at least.
I agree with Kristinn and the old media.