Rift opens with full servers, queues

This was the situation just minutes after launch:

Almost all servers were full

Long queues to join

Shortly after the above screenshots were captured, the last servers filled leaving none available for waiting players to join. More servers were brought online fairly quickly which absorbed many of the waiting players, but queues on the original group of servers remained lengthy due to the number of guilds which had prearranged to play on them.

Performance on the servers I was able to join seemed decent and they remained stable for several hours, with 15 minutes of downtime for a performance adjustment.