Actually their login servers have a ton of capacity since they have an SPA system. All their sites use a central login system, hence you change your login at one place say for MDE and it changes for DVC. I can login to DVC right now no problem. Its just the servers that handle their WDW/MDE site are limited and are getting the stress...
A CM directly told me 7am yesterday on the AP services line. Several other people reported the same. Of course we know, sadly, thats not always reliable info.
I just don't understand how they can have such a disastrous roll out of something - if it happened once I'd (almost) understand...but EVERY SINGLE TIME?