Siri knows the best phone, and it is not the iPhone!
As what I spotted on WMPowerUser's post, Siri was asked, "What's the best cell phone ever" then it shows Nokia - Lumia 900 as a result.
As we all know, if we asked Siri what is the best phone, it will answer, "The device you are holding (referring to iPhone)". This time it shows a Windows Phone as result.
This question is not programmed by Apple, but the result was provided by an analytical engine Wolfram Alpha as shown here.
Many said that this question didn't show same answer, one thing we all know, this is a slap on their own device.