Oh dear, I remember the X3 launch. It was supposed to come out on a Friday, which it did. I also got my copy on that particular day. Some of us received it on Thursday, though, so a day before. And from what they told us the game was pretty much unplayable since you couldn't even leave the first sector.
Luckily Egosoft released a patch very quickly, on the following Saturday if I am not mistaken. Most developers aren't that enthusiastic. Piranha Bytes took a week or so to fix a simple bug in Risen that caused lighting glitches on some GeForce 7xxx cards.
I just hope that the same thing won't happen to X Rebirth although the launch of X3 Terran Conflict went pretty smoothly, if I remember correctly.