They also advertised the hell out it too though of course

You certainly wouldn't guess from the adverts that it is beta.
Agreed, I wasn't aware it was beta, and I'd guarantee that the majority of iPhone users have no clue either.
Most of the time I'll encounter Siri issues due to the phone wanting to hang onto a distant WiFi router instead of transitioning back to the 3G network. The way Siri reports this is the same as if the server is actually down...
That's definitely not what we're seeing (that's a pretty specific scenario).
I'm not saying it's down all the time, but she has noticed issues. Of course, the worst was the period right around Christmas, when everyone was getting their new phones and trying Siri out
