I popped down at lunchtime - all working correctly. As has been noted, they are under test at the moment. Considering the public testing only started yesterday at 4pm, then it is all going pretty well.
The new Myki barrier was working when I went through yesterday evening. At last I can get to see the Myki balance as I touch on or off.
This morning it didn't seem as quick as last night. It felt like it took 2-3seconds to open the barrier, while I am hoping for about 0.5 seconds. It's still faster than when Myki started on the frankenbarriers in January.