It works for me. If I say call "X", it calls X.
I think you have it backwards. Siri is not even close to Google Now. Google Now is far more useful. I love the realtime commute traffic report it provides me without asking. That is brilliant.
I have to say 'Call "X" at "Y"' for it to work. Even if I only have one number per contact, I still have to specify "mobile" or "work". On Siri, I can say "Call X" and it just dials the cell phone number if it's the only one in my address book.
Google Now is creepy. A few days after I had my GNex, it started giving me the transit times between my house and work, or vice-versa, without me specifying where either location was. It wasn't EXACT, but it was close enough. Too creepy. And while I'm sure some people will find something like that useful, like yourself, I have no use for it at all. I'm going home one way or another and there's really only one way to get there.
