Source: BioWare Blog
It just seems to be the aim of the game for all major releases to have either a brilliant demo and terrible full release, or to have a terrible demo and a decent full game. We only hope that BioWare takes the latter option, instead of just having a complete flop.
So far, the game has had numerous problems on the VIP demo release, including infinite loading screens, unstable performance, graphics options not working properly and some players have been unable to even launch the game. BioWare has now formally apologised for the issues and has outlined how they will be improving upon these issues.
Chad Robertson, the head of live service at BioWare, has denied that some of the issues are down to having performance issues at the server level. He states: "To ensure stability, we intended to manage our servers to match the player population as it grew," and continues, "Overall, we had excess capacity prepared for population increases, and continue to do so."
Allegedly a large number of the issues were caused upon initial release of the demo, which "was caused by the spike in players entering the game when we opened up. Unfortunately, these issues did not present themselves during our internal testing. " to which Chad has said "We believe we’ve resolved most of these".