Things you wouldn't know if you didn't watch the simulcasts....
Matti Salminen was a tango singer in his native Finland before switching to opera. Of course you were all already aware of the great Finnish tango tradition.
Michelle DeYoung is even taller than Susan Graham.
The entire broadcast of Tristan und Isolde was directed for HD by someone named Barbara. This was a new approach and worked very well for the particular production. At least one section of the screen would show the whole stage so you wouldn't miss the lighting effects that were so important. I thought it worked most of the time. Shrunk down to a small screen it would not work at all. There was a lot of panning in and out, too.
Deborah Voigt and Robert Dean Smith had absolutely no rehearsal time together, but had at least met before.