Are addons able to "communicate" with other player addons in the new Core?

This is a question for the server developers, on retail addons are able to pull information from one another, previously on Warmane, this feature was not working. Just wondering if on the new Lord core, is this working?

For example, if everyone in the raid has a raid CD addon, your current CD times can be sent to all other players in the raid constantly. Also, DBM version checks, sending pull timers, etc..

This does not work? As far as I know, addon channels have always worked.

They didn't work in MOP. I never tried old WOTLk, did they work there?

They have always worked on Deathwing. At least for raid/party and guild.