The last minute scramble to do something about the condition of MK? Reminds me of the work done in DLR just before their 50th.
Suddenly buildings all over the park are getting extensive fixing-up, plans for new attractions that a year ago would have seemed unlikely are now begin pushed, multiple attractions are getting minor to major fixing (from new paint on JC critters to HoP's redo) etc. It would seem odd for Disney to do something for nothing, and even odder for Disney to acknowledge the work begin done to fix something negative.
We may be setting ourselves up for disapointment, but the evidence is there to suggest that Disney is getting ready for something and the 40th just seems very logical at this point. We will find out in 2011.
Finally, IMO 40 > 5, 10, 15, but to each his own.