1) For DSL subscribers: their subscribed base plan speed will be reduced until end day and will resume the following day if they availed Speed Boost add-on/s or a new DSL plan starting on November 11, 2011.
2) Just expect the worst speed, like dial-up speed.
3) The number of users they put on that website is their advisable number or user. It's still up on the owner if he will use it for more than 3 users. Just remember, if you have more # of users sharing with your connection, it will slow down your speed.