This is similar to most launches. They want to test the patch server. So they do a patch in middle of prime time (west coasters) and see how many people hit it before it dies. Better to find out flaws now than launch day.
This was pretty standard fair during closed beta. Slow ass patch downloads, all the time. Not once did I have a patch during closed beta finish in under 5 hours. This is exactly the same crap that ****ed everyone off the last go around.
I had a similar problem, first it took several tries to launch the launcher then it stayed on conecting... for about 20 minutes. I'm actuall downloading now but it stalls for about 5 minutes on all factors of 7. It stalled on 7%, 14% and 21% so far.