The machines haven’t arrived yet but I wouldn’t expect we’d have the data to prove this out. As you’ll know, number of tickets complete is a weak proxy for value delivered, and can be so wrong as to imply a team that you know is 2x as productive is half as much as another, or worse.
The best way (imo) to measure this is setting a threshold that we agree is bad (in our case, this is 1m+ builds) and continually measuring it so we catch when that starts to happen more frequently. And listening to devs when they say things have got slow/have become irritating.