I got a ticket when it first opened right before noon CDT. I had three browser windows open on my PC on the home wifi and two on my phone on the mobile broadband. I periodically refreshed each. At certain times the "registration open soon" page would load very slowly but usually the page would not load quickly enough and generate an error message from within the browser. I got lucky, one of the browser windows on my phone loaded the registration link and I was able to get a ticket right away.
I feel for everyone who did not get to register. I know the disappointment from the SWA event last fall as well as the most recent DAL event when I was not able to get a ticket.
Hopefully the recruitment personnel at the majors can come up with a better system. I think a good and fair way would be to opt in to a ticket lottery from your application.