I completely agree with original poster. I have no idea why Apple have ommited Siri from the iPad 2. The iPad 2 has almost identical specifications to the iPhone 4s (The phone which Siri debuted on) and still is behind the iPhone 4 in getting it (if ever it does get it).
Unbelievably disappointed in Apple. Was contemplating swapping Android for an iPhone with the new iPhone 5, but this has soured my taste with Apple. Will more than likely invest in a high end Android now.
Also to people wondering why people are upset that the iPad 2 isn't supporting Siri - the iPhone 4 is a lesser device technically than the iPad 2. It's processor is a generation older and is single core, not double. The iPad is on par with the iPhone 4s, yet doesn't get this update.
Baffled right now. The only thing this has done to my iPad is removed Google Maps (which I will download and use primarily once available in App Store) and removed YouTube, forcing me to use either the browser version, or a crap iPhone scale up.
Oh and thanks for the alarm clock Apple...a bit late to the party, probably because you didn't have an alarm clock before.
Rant over.