I just spent about 15-20 minutes chatting to one of the "cast members" at Shanghai Disney Resort via the online chat facility.
Excited, I signed onto it at 7am CST (the billed opening time) but it actually didn't open then. However, it finally opened just after 8am CST.
The first person I got connected to only spoke Mandarin, but quickly put me through to an English speaker. The agents do not reply quickly...they are "typing..." for ages at a time.
Basically at the moment the agents do not have any further information than what is on the website. It seems their primary role is just to tell you about how great Shanghai Disney Resort is based on publicly-available information, and if you ask any more complex questions then they will just tell you to keep checking the website for more updates.
I asked all the relevant questions like "when will booking open", "what date can you check in to the hotels from", "what are the prices", "what time of day do you open on June 16", etc. But they just gave me stock answers each time without providing any information that's not publicly known.
I guess they have launched the chat facility today just to give their staff some training dealing with the public, rather than because they have any actual services to provide at this point......