I have raised this many times before, and will point it out again. Adobe is applying a base level noise reduction of sorts, this cannot be disabled. The reason you are seeing other raw software pull out more fine details, is because they don't do this.
Until Adobe sit up and recognise the issue, nothing is going to happen about it. This has gone on for a long time now..
It is a problem, esp notable at high ISO. C1 4 and other programs like Raw therapee, run rings around ACR for this type of work. All that is needed, is a simple on/off for the NR going on by default.
Thomas Knoll would do well to visit the C1 site, and RT..download the software...and then he would see how ill informed the base level NR is.
I don't think there is much wrong with the algorithm adobe use, it's that NR that is the problem. As it is, LR would be a far more potent tool, if it kicked out raws like C1 4 can..