We often get logged off due to WiFi capacity issues at WDW.
According to the tech people that I have spoken to, Disney never anticipated that families would bring so many wireless devices and each stream video.
During our last stay DW complained that she was having connection issues, I explained the known streaming video issue and she told me that she wasn't even streaming video, she was watching YouTube.
We all know too well that the one department that Disney cheaps out on is the IT department. Which is surprising given the imagineering basis of the company.