Do you guys have problems with siri on iphone 5?

I recently changed my settings to voice activation.
However, when I lift to my ear I don't hear SIRI's voice.
Sometimes though I can hear siri?

Siri has left you for another I phone 5 user. Happened to me…

Nope

I have an ipod touch and frankly Siri need a lot of work. I ask it questions and i get a ''WHAT" as an answer. We really need a Siri 2.0 because even common questions Siri can answer like this one

''when was the last time the new york islanders made the playoffs''

I don't have it but I was thinking of getting it. I'm not sure if I want to switch from the Android market though.