As the original article points out, these two kids achieved something that the worst of the World War Two bombing of London was not able to do, which is to shut down a major city for a day.
Rightly or wrongly, terrorists will view this as a spectacular success, in some ways greater than 9/11 since it only took a couple of kids to pull off.
I don't know if that kid feels victorious but you can be darn sure that his peers are throwing high fives all around.