I shared those in the thread I mentioned above.
It’s interesting that you say that. I thought surely we can do better, but I was discusing this with anoek literally just yesterday and he shared stats that show it’s pretty darn good already.
There’s the occasional outlier, like a recent Dan automatch that waited 13 minutes, but the vast majority of matches across all ranks are in under a minute. I’d hesitate to mess with this - it’s …you guessed it …
… a can of worms 
I suspect my own worse-than-reality impression of it, like others, is due to the fact that you notice the times when you have to wait