In fairness testing is HARD. It requires a team to try to break something they have spent a lot of time and money developing. It's also easy to test with 1 or 2 hits coming at time. Far harder to test with hundreds of hits.

But it HAS to be done if you want a smooth go-live.

Worse, it appears that their booking engine confirmed not only reservations but also payments of those who booked but did not pay before it was shut down.

Those folks are in the fascinating situation of being the beneficiaries of a MegaDo fare mistake in their favor....will the DOT be informed if they do not honor the $0 booking and payment confirmations? Will lawsuits be threatened?

Seriously, though, this is why one tests.