I'm Using the first gen LG G watch, received the Marshmallow 6,0,1 update this morning OTA.
Now i can say "ok google'. 'send WhatsApp message' 'to so & so' 'dictate out the message'

Has your zenwatch 2 speaker been activated?

No need. Have you installed the Android wear app on your phone? Once paired, it will automatically push all your fb, WhatsApp etc notifications to the watch. You can also block notifications from apps you don't want.

On your phone go to settings ->about-> system updates to check for updates OTA. Also check on versions, it should be 5.1.1 but 6.0.1 is being rolled out now.

Have fun talking to the watch. 'OK google' and ask it questions or give orders 'send message to ...'

Think the speaker in zw2 should be activated in the 6.0.1 update, the watch can speak back to you, beep or can make voice calls. I wanted to confirm with you if it could.

Yup. WhatsApp is not in the watch. I can reply to incoming whatapp message and initiate a WhatsApp message send via voice. ' ok Google send WhatsApp messsge', then I'll be prompted for name, and message. Works for those with standard English names and simple Chinese names so far.
I don't have we chat

Directd

Android 6.0.1 update

If I mute the phone, the watch also does not vibrate on receiving notifications.

Its only when I put the phone to vibrate that the watch still receives notifications and vibrate.

Did any of you notice that?

Don't think the moto360 has speakers. So it can't make calls.

Thanks for correcting me, Oh means can talk to the watch but the reply will come from phone - speaker mode?

I used to have a china "bluetooth' smartwatch, which had speakers, but I didn't like it, talking and receiving replies via the watch. It was like a speakerphone, and all those ppl surrounding me can hear my conversations.