Good to hear but I can honestly let you know in 24-48 hours it will be to late. You will have yourself and even bigger problem with people raging and complaining that it took you too long and now instead of playing in the first CBT they are downloading the game and using the time patching the client.
I'm not the one to call the shots here but giving hopes of any sort of "contingency plan" just sounds like it is going to backfire.
Best of luck.
I don't know if keeping the launcher open with the completed download continues to send files to other clients downloading the game, but I've kept mine open regardless just in case for those very people. P2P works best when people are actually sharing.
One thing that has me incredibly worried, since this happened to the last two games I purchased in a row, the games came without registration keys. One was a recent MMO that will not be named that turned out to be utter garbage by my standards and the other was a WRPG that's famous for a leg injury. Imagine the feeling of you opening the game case for the first time and looking all over for a key that is suppose to be there but isn't. Oh well I'll just try to assure myself that those were just extreme cases of bad luck. I'll put faith in EME since they displayed that they are willing to do their best to help their clients instead of giving them the run around.
Ah! I never got around to trying out that MMORPG, I was excited about it when it was first announced, but a lot of the things the developers were saying very early on completely turned me off from the game. The company had steadily been going down hill ever since they got hugely successful and popular, so I'm not entirely surprised to be honest.
Any way, here's hoping that all goes well with TERA and we've hit the last bumps in the road.