I ordered mine on May 9 and I received them May 13! It seems that the people who ordered them the first few days they were available were experiencing delays in receiving them. Maybe there were just so many requests that a backlog resulted and they're just catching up now!
The tickets are actually like plastic credit cards and not paper. Also, when you do receive your tickets, check the date on them to make sure it's correct. I've read a number of posts that say that the dates are wrong.