I joined twitch in 2013 with the gamer name of FuriousPaul and I streamed speedruns of the classic Castlevania games from 2013 - 2017. Lately my streams have died down quite a bit due to working on Classic WoW leveling guides every day.  Although I may come on occasionally and play a random game for fun on my Twitch stream.  I talk a lot about WoW speedrunning on my channel, so feel free to follow and hang out to discuss vanilla WoW if you like.  Classic WoW will be my main focus for a long time.  Unfortunately I will have to wait until Classic WoW comes out before I start streaming it.
Finally, a clip of WoD: https://www.youtube.com/watch?v=YtKDmlNLVtE&t=5m26s This one I have petattack macroed to a button on the right-side action bar, 2nd from the top left side (icon looks like a bone bow). You can see my bird pet take off INSTANTLY when pressed. I realize this one doesn't prove much regarding Classic, but this is proof that it WAS functioning this fast until Legion. You can see the delay on Live yourself by logging into BFA.
 ":"  -  Any time a step ends in a ":" instead of a "." means that the next step is part of the current step you are on.  This generally means the next step should be done while working on the current step.  This means every "start working on" or "continue working on" will end in a ":".  But this is used with other occasions as well, so keep this in mind.