Now that the cat is out of the bag, there are several reviews appearing on the internet, mostly videos. One thing I noticed is ejection pattern being a bit different especially during the first few rounds of rapid firing. It could be a mistake, or maybe it has some kinks that needs to be worked out. At this point SR series doesn't seem to be scheduled to be phased out to make room for this pistol.
Here's a video intended for Ruger's sales training
Dave Spaulding worked with Ruger in the past and he shares video with both 9mm version and .45 acp version.
Video stops around 1:10, so skip to 1:40, and a few more around 3:08. Facebook has problem free version
Downrange TV has a video where you can see internals clearly
824 warrior ran some Bill drills