tried and failed and failed and failed!
The pure logic that a CSM makes no difference to a non counter means as much as most logic when it comes to these gamblers.
In areas where casinos compete, especially when the CSM was something new, "revolutionary" and sold by the hustling shufflemaster salesman as something that will increase hands per hour and defeat counting, absolutely stupid casino execs signed expensive lease contracts for these gizmos. The smart casino execs, both of them, realized that it can not do what the salesman promises if the average player will not play on it.
Non counters, especially those ploppys who bet big and believe in the Flow refused to play and their business went elsewhere. That is why today, lessons learned, you find the CSM only on the lowest of bet level tables in places like Vegas and absolutely none in any high limit room or area.
As far as the speeding up of the game goes, I have doubts they get even much of that. Since the CSM is on $5 and $10 tables only (except on especially crowded times), you tend to have no one but pure novices who often take a ton of time to make up their minds on how to play their hands, defeating the saving of shuffle time.
The answer for many casinos as they learned their lesson but still wanted more hands per hour is the ASM. Here you still play a whole shoe and those believers in the "Flow" would play but the casino does get their additional hands.
Now if you have a casino in a remote area and enough addicted gamblers going there, you might be able to install all CSM's and be effective, but most casinos have competition.