As I quoted from 9to5mac in my post:
"In 2003, the US Government began the most ambitious Artificial Intelligence program in its history called the “Cognitive Assistant that Learns and Organizes” or CALO program. The name was inspired by the Latin word “calonis”, which means “soldier’s servant”. Funded by DARPA as part of its Personal Assistant that Learns project, the program ran for five years and brought together more than 300 researchers from 25 of the top university and commercial research institutions, with the goal of “building a new generation of cognitive assistants that can reason, learn from experience, be told what to do, explain what they are doing, reflect on their experience, and respond robustly to surprise.
The program was coordinated through SRI International in Menlo Park, CA. As the program ended in 2007, SRI took the knowledge gained by the CALO and some of its key players and formed Siri."
In my opinion it all stems from the trust on Apple. Apple has the reputation that they don't ship half-products and with the rumours going strong that Siri would be part of iPhone 5, everybody is simply jumping on the bandwagon and _assuming_ that Apple has solved the voice recognition problem.
As much as awesome Apple is, I still find it hard to believe that they have figured out voice-recognition.